Semen human sperm midpiece. Medical search. Frequent questions

The mitochondrial sheath (MS), an important organelle in the midpiece of spermatozoa, is crucial to sperm motility. (nih.gov)
has been used for many years to provide an objective measure of semen characteristics including assessment of motility, concentration and morphology. (myhealth.gov.my)
However, the over production of oxygen free radicals in sperm membrane decreases the antioxidant defense activity thereby leading to low sperm motility and viability, DNA fragmentation and protein denaturation. (scialert.net)
Main and end piece contains axonemal contractile filaments for sperm motility. (iasri.res.in)
Motility of sperm is visible under ordinary microscope in diluted semen sample. (iasri.res.in)
After staining with R123, fluorescence intensity in the sperm midpiece is related to the mitochondrial membrane potential and motility. (purdue.edu)
Bright green fluorescence was correlated with vigorous sperm motility and dull green fluorescence correlated with slow motility. (purdue.edu)
normal motility group and abnormal motility group) by 2.0 ml of Ham's F-10 medium and 1.0 ml of semen. (ijfs.ir)
It is suggested that large-scale deletions of the mtDNA is associated with poor sperm motility and may be a causative factor in the decline of fertility in men. (ijfs.ir)
Sperm motility is one of the key indicators of fertility in men. (ijfs.ir)
first demonstrated the association of the 4977 bp deletion of mtDNA with low motility of the human spermatozoa. (ijfs.ir)
It has been suggested that these mutations cause infertility by affecting sperm motility. (ijfs.ir)
In a prospective, controlled and blind study, nineteen patients, aged 24 years ~ 42 years and married for 3 years ~ 11 years without children with semen abnormalities in concentration, morphology and/or progressive motility without apparent cause, were randomized into two groups and submitted to acupuncture and moxa treatment at the therapeutic (Study Group) and the indifferent points (Control Group), respectively, for 10 weeks. (wimbledon-acupuncture.co.uk)
We have proposed this prospective, controlled and blind study on infertile patients presented semen abnormalities in concentration, morphology and/or progressive motility to evaluate if acupuncture and moxa treatments could improve the semen parameters. (wimbledon-acupuncture.co.uk)
Nineteen patients without children were included with semen abnormalities in concentration, morphology and/or progressive motility detected in 2 semen analyses at the Human Reproduction Laboratory of São Paulo Federal University. (wimbledon-acupuncture.co.uk)
MDA levels were negatively correlated with the sperm motility (MDA = -0.014 x motility + 2.62, p =0.017) and concentration (MDA = -0.0045 x concentration + 2.23, p = 0.0166). (ijbs.com)
GPx activities were positively but non-significantly correlated with the sperm concentration and sperm motility. (ijbs.com)
Seminal MDA concentrations are negatively correlated with sperm concentration and motility, which might provide a simple and useful tool in predicting sperm parameters. (ijbs.com)
However, these criteria can only be applied when sperm analysis is carried out at 37 °C. Sperm motility is highly influenced by temperature and should always be assessed under controlled thermal conditions (5). (biochemia-medica.com)
Since, the motility analysis at Andrology Laboratory was performed at room temperature (22 °C), we had to readjust the sperm motility criteria. (biochemia-medica.com)
sperm count of 14 million/ml with 35% active motility and 100% morphologically abnormal sperm, indicating globozoospermia. (jri.ir)
Common problems in male related infertility are sperm count, motility or structural abnormalities. (jri.ir)
However, sperm quality-the motility (movement) and morphology (shape) of sperm-decrease after two days of abstinence, with a significant impact seen after 7-10 days. (whatfuture.net)
Epididymal spermatozoas are often described as immature, immotile, and infertile sperm cells, yet the epididymis is the organ where spermatozoa mature, acquire motility, and become fully fertile. (encyclopedia.pub)
In mammals, adenosine 3', 5'-cyclic monophosphate (cAMP) is known to play highly important roles in sperm motility and acrosomal exocytosis. (plos.org)
It is involved in flagellar movements and motility, and in cellular events that occur in the sperm head, that will lead to successful interaction with the egg and to fertilization [ 1 , 2 ]. (plos.org)
Functional assessments on sperm included counting sperm amount and sperm motility, staining F-actin, and quantifying adenosine triphosphate (ATP) content. (biomedcentral.com)
Testicular torsion-detorsion significantly decreased the amount of sperm, inhibited the motility, declined the F-actin expression, and reduced the content of ATP in sperm. (biomedcentral.com)
Local injection of MSCs improved sperm function, particularly in sperm motility. (biomedcentral.com)
Local injection of MSCs into a testis damaged by testicular torsion-detorsion restores sperm function mainly through the improvement of sperm motility and energy. (biomedcentral.com)
By contrast, the kinetics of protein tyrosine phosphorylation and sperm motility are unaltered in mutant sperm relative to wild-type. (biologists.com)
In spermatozoa, several key functions are regulated by cytoplasmic Ca2+ concentration such as sperm capacitation, chemotaxis, hyperactive motility, and acrosome reaction. (123dok.net)
Sperm can modulate their energetics by regulating their flagellar waveform -- how the sperm oscillate their tails -- in order to adapt to varying fluid environments, potentially optimizing their motility and navigation within the reproductive tract, according to new research. (womenshealthdaily.com)
A well-balanced diet rich in essential nutrients, vitamins, and minerals is vital for supporting sperm production and motility. (mensclinic-jhb.co.za)
For instance, incorporating walnuts, which are rich in omega-3 fatty acids, can enhance sperm vitality and motility. (mensclinic-jhb.co.za)

The patients' spermatozoa displayed multiple midpiece defects, including absent MS and central pair, scattered or forked axoneme and incomplete plasma membrane. (nih.gov)
Spermatozoa from Armc12 -/- mice showed parallel defects in the midpiece. (nih.gov)
The morphological assessment of human spermatozoa which includes the evaluation of the percentage of morphologically normal sperm and the determination of the incidence of various morphological abnormalities has always been part if semen analysis in couples consulting for infertility. (myhealth.gov.my)
Assessing approximately 200 spermatozoa and the value of normal sperm is calculated in percentage. (myhealth.gov.my)
The process of passage of spermatozoa or semen out of male genital tract is termed as ejaculation. (iasri.res.in)
Semen is the term given to secretion of male genital tract and it contains spermatozoa and seminal plasma. (iasri.res.in)
Approximately 3.5 ml semen is discharged with every ejaculation and one milliliter of semen contains about 100 millions spermatozoa. (iasri.res.in)
It contains a fluid called seminal plasma and spermatozoa in varying number (sperm concentration). (iasri.res.in)
1. Testes produce spermatozoa that can be considered as confirmatory evidence for the presence of semen. (forensicsdigest.com)
The male reproductive system consists of a pair of testes that produce sperm (or spermatozoa ), ducts that transport the sperm to the penis and glands that add secretions to the sperm to make semen (see diagram 13.2). (wikibooks.org)
Animals produce motile sperm known as spermatozoa, and some red algae and fungi produce non-motile sperm cells. (fertiligy.com)
Recent studies have shown cytoplasmic droplets to be normal morphological occurrences in human male spermatozoa. (biomedcentral.com)
It is a familiar element of mammalian spermatozoa, though many studies in the past have focused primarily on CDs in non-human species. (biomedcentral.com)
CDs of normal human spermatozoa are still present after ejaculation [ 6 ]. (biomedcentral.com)
Mature human spermatozoa are similar to that of other mammals in possessing a CD at the midpiece. (biomedcentral.com)
After total DNA extraction, a long-range polymerase chain reaction (PCR) technique was used to determine the mtDNA deletions in human spermatozoa. (ijfs.ir)
However, low levels of mtDNA deletions have been identified in human spermatozoa and studies have not found a clear relationship between large-scale mtDNA deletions and male infertility. (ijfs.ir)
Therefore, the identification of mtDNA mutations in the pathophysiology of human spermatozoa dysfunction is considered to be important better understanding the etiology of idiopathic infertility in men. (ijfs.ir)
Excessive generation of ROS in semen, mainly by neutrophils but also by abnormal spermatozoa, could be linked with infertility. (ijbs.com)
Human spermatozoa possess these defense enzymes, which might be useful in the prediction of sperm fertilizing potentials [ 5 ]. (ijbs.com)
Type 2 is classified as partial globozoospermia in that the ratio of round-headed spermatozoa is less than 100% (i.e., 20-90%) in a semen sample and acrosomal vesicles are present in the rest of the spermatozoa (3). (jri.ir)
The mature and ejaculated spermatozoa are carried to the female tract in seminal plasma, which supports key sperm functions such as interactions with the various environments of the tubular genital tract, with the oocyte and with the female immune system and potentially helps modulate sperm rejection or tolerance [ 2 ]. (biomedcentral.com)
That's an active, motile sperm - plural spermatozoa, or just plain sperm. (ussromantics.com)
A decrease in levels of reduced glutathione (GSH) during sperm production is known to disrupt the membrane integrity of spermatozoa due to increased oxidative stress. (carmk.net)
Mature spermatozoa are characterized by an head, midpiece and a long tail for locomotion. (womenshealthdaily.com)

The morphology of sperm cells is the end result of a highly complex process of cellular modifications occurring during spermiogenesis. (myhealth.gov.my)
However, the focus of this article is going to be on the assessment of image analysis to indicate the normal sperm morphology of an ejaculate. (myhealth.gov.my)
Sperm morphology was assessed in the initial semen analysis using the Kruger-Tygerberg Strict Criteria as outlined by the World Health Organization. (myhealth.gov.my)
More studies of fertility outcomes in large populations are required to refine the application of CASA to measuring sperm morphology. (myhealth.gov.my)
Assessment of sperm morphology is one of the most important steps in the evaluation of male partner in infertile couples. (biochemia-medica.com)
The World Health Organization (WHO) has so far published several manuals in order to standardize semen analysis procedures and WHO criteria have become widely accepted in sperm morphology examination at andrology laboratories all over the world (1,2). (biochemia-medica.com)
scoring morphology in its multiple categories, and importantly using these for quality control (e.g. do operators agree on number of midpiece defects, not an overall 'normal' percentage of everything combined). (arcscientists.org)

Semen composition is described in terms of volume of ejaculate (i.e. volume of semen discharged per ejaculate) and sperm concentration (i.e. billions of sperms present in one milliliter of semen). (iasri.res.in)
Since the bead concentration is known, a simple calculation determines the sperm concentration, an important parameter of fertility potential. (purdue.edu)
Infertility in men can result from deficiencies in sperm formation, concentration, or transportation. (medscape.com)
Free radicals have beneficial or detrimental effects upon sperm functions, which depend on their nature and concentration. (ijbs.com)
Studies have found that after two days of abstinence, semen volume and sperm count/concentration may increase, but sperm quality decreases. (whatfuture.net)
However, studies have found that semen volume and sperm count/concentration increase after two days of abstinence, but sperm quality may decrease after seven to ten days. (whatfuture.net)
For men with normal sperm counts, studies have found that semen volume and sperm count/concentration increase after two days of abstinence. (whatfuture.net)
Although abstaining from ejaculation may lead to an increase in semen volume and sperm count/concentration, this does not necessarily mean that it will increase fertility. (whatfuture.net)
In conclusion, abstinence may lead to an increase in semen volume and sperm count/concentration, but it may also lead to a decrease in sperm quality after seven to ten days. (whatfuture.net)
As in somatic cells, sperm intracellular cAMP concentration is regulated by the opposite action of two enzymes: the adenylyl cyclases (AC), which synthesize cAMP from ATP, and the phosphodiesterases (PDE), which break the phosphodiester bond of cAMP to form 5'-adenosine monophosphate (AMP). (plos.org)
Infertile men may have deficiencies in sperm formation, concentration (eg, oligospermia [too few sperm], azoospermia [no sperm in the ejaculate]), or transportation. (medscape.com)
A recent report from researchers in Aberdeen presented preliminary data that suggests the sperm concentration of the men seen in their clinic had declined by 29% over the past 14 years. (carmk.net)
Researchers have found in a new systematic review that there is a strong association between insecticide exposure and lower sperm concentration in adult men globally. (womenshealthdaily.com)
It shows that frequent use of mobile phones is associated with a lower sperm concentration and total sperm count. (womenshealthdaily.com)

The size of the sperm midpiece is determined in part by the volume of mitochondria in the sperm. (wikipedia.org)
Sperm midpiece size is tied to sperm competition in that individuals with a larger midpiece will have more mitochondria, and will thus have more highly motile sperm than those with a lower volume of mitochondria. (wikipedia.org)
MDT combines sperm and egg from the biological parents with healthy mitochondria from a female donor's egg. (ivf.net)
The mid-piece of sperm contains several mitochondria. (forensicsdigest.com)
The midpiece harbors the small "powerhouses" (mitochondria) that produce the energy, which fuels the rapid tail movements needed for propulsion. (healthandscience.eu)
There are ~22-80 mitochondria in the midpiece of a single mature mammalian spermatozoon (2-4). (ijfs.ir)
The midpiece contains the mitochondria. (ussromantics.com)
The midpiece houses mitochondria, the powerhouses that fuel the sperm's journey through the female reproductive tract, while the tail acts as a propeller for mobility. (mensclinic-jhb.co.za)

The volume of sperm in ejaculates scales proportionately with testis size and, consistent with the intermediate weight of human males' testes, ejaculate volume is also intermediate between primates with high and low levels of sperm competition. (wikipedia.org)
In situations where the risk of sperm competition is higher, males will allocate more energy to producing higher ejaculate volumes. (wikipedia.org)
Among humans, as with relative testis size and ejaculate volume, the size of the sperm midpiece is small compared to other primates, and is most similar in size to that of primates with low levels of sperm competition, supporting the theory that humans have had an evolutionary history of intermediate levels of sperm competition. (wikipedia.org)
1. If a criminal is oligospermic , then his ejaculate may contain only a few sperms. (forensicsdigest.com)
Once the sperm has matured, they will enter the pelvis and ejaculate. (fertiligy.com)

Mammalian sperm cells present highly specific lipidic composition, high content of polyunsaturated fatty acids, plasmalogenes and sphingomyelins. (scialert.net)
The CDs of mature non-human mammalian sperm are found at the distal end of the midpiece. (biomedcentral.com)
Mammalian sperm must undergo a physiological maturation, termed capacitation, before they are able to fertilize eggs. (biologists.com)
This review aims to provide insights into the structure, localization, and function of the mammalian CatSper channel, primarily human and mice. (123dok.net)

The protamine status, chromatin structure, chromatin condensation, and acrosome reaction of sperm and assisted reproductive outcomes were determined in couples with different male infertility factors. (ecerm.org)
In addition, the presence of S. saprophyticus and E. coli in semen samples was associated with a lower likelihood of clinical pregnancy in couples with various factors of male infertility. (ecerm.org)
In addition, the effects of bacteriospermia on sperm quality and assisted reproductive outcomes were studied among couples with different factors of male infertility. (ecerm.org)
The cytoplasmic droplet then becomes known as excess residual cytoplasm, which can impair overall sperm function and produce higher levels of reactive oxygen species, potentially leading to male infertility. (biomedcentral.com)
In this analytic study, a total of 25 semen samples of the nor- mozoospermic infertile men from North of Iran were collected from the IVF center in an infertility clinic. (ijfs.ir)
Patients sought infertility treatment in the Human Reproductive Division of the Department of Gynecology and Discipline of Urology of the São Paulo Federal University Paulista School of Medicine between January 1999 and September 2000. (wimbledon-acupuncture.co.uk)
Indications for performing a postcoital test include semen hyperviscosity, increased or decreased semen volume with good sperm density, or unexplained infertility. (medscape.com)
Testicular biopsy is indicated in azoospermic men with a normal-sized testis and normal findings on hormonal studies to evaluate for ductal obstruction, to further evaluate idiopathic infertility, and to retrieve sperm. (medscape.com)
On the other hand, this lipid membrane makes the sperm cell sensitive to oxidative damage caused by reactive oxygen species (ROS)( 2 2 Sheweita SA, Tilmisany AM, Al-Sawaf H. Mechanisms ofmale infertility: role of antioxidants. (scielo.br)
The initial evaluation of the male patient should be rapid, noninvasive, and cost-effective, as nearly 70% of conditions that cause infertility in men can be diagnosed with history, physical examination, and hormonal and semen analysis alone. (medscape.com)
Other reasons for infertility include congenital factors, and health conditions like prostatitis and diabetes that can affect sperm production. (carmk.net)
There is strong clinical evidence to show that men diagnosed with infertility have high levels of oxidative stress that may impair the quality of their sperm. (carmk.net)

2. Another reason could be the condition of Aspermia where no sperms are produced by the seminiferous tubules of the testes. (forensicsdigest.com)
In many animals (including humans) the testes descend into the scrotal sacs at birth but in some animals they do not descend until sexual maturity and in others they only descend temporarily during the breeding season. (wikibooks.org)
Sperm is created in the testes and move through a coiled tube, called the vas deferens. (fertiligy.com)
The key male reproductive organ in humans is the testes. (biomedcentral.com)
The paired testes are a crucial component in this process, as they produce both sperm and androgens, the hormones that support male reproductive physiology. (bccampus.ca)
The structures of the male reproductive system include the testes, the epididymides, the penis, and the ducts and glands that produce and carry semen. (bccampus.ca)
This location is important in sperm production, which occurs within the testes, and proceeds more efficiently when the testes are kept 2 to 4°C below core body temperature. (bccampus.ca)

Excessive generation of ROS in semen may be associated with reduced sperm fertilizing potentials. (ijbs.com)

A better understanding of the function of this organ and of the chronology of sperm maturation may elucidate the etiological background of many idiopathic subfertilities that are related to disorders in sperm maturation. (encyclopedia.pub)
It is through their transit in the epididymis that sperms cells complete important maturation steps crucial for fulfilling their functions. (123dok.net)
Several accessory organs and ducts aid the process of sperm maturation and transport the sperm and other seminal components to the penis, which delivers sperm to the female reproductive tract. (bccampus.ca)

However, to the best of our knowledge, no study in the literature has yet investigated the impact of Staphylococcus saprophyticus on sperm quality and male fertility potential during in vitro fertilization (IVF) techniques. (ecerm.org)
Isolated teratozoospermia does not affect in vitro fertilization outcome and is not an indication for intracytoplasmic sperm injection. (myhealth.gov.my)
Semen and sperm are then fused together during fertilization, and the result is a child. (fertiligy.com)
This can lead to an increase in the number of abnormal sperm cells, which are not as viable for fertilization. (whatfuture.net)
At the same time, we found evidence for recent positive directional selection acting on several human testis-enriched genes ( MORC1 , SLC9B1 , ROPN1L , DMRT1 , PLCZ1 , RNF17 , FAM71D and WBP2NL ) that play important roles in human spermatogenesis and fertilization. (biomedcentral.com)
Gamete interaction is a crucial event during fertilization when receptors on sperm bind to ligands on the extracellular coat of the egg, called the zona pellucida in mammals. (biologists.com)
The sperm-specific ion channel CatSper is the principal calcium channel in sperm mediating the calcium influx into the sperm flagellum and acting as an essential modulator of downstream mechanisms involved in fertilization. (123dok.net)
Sperm, the microscopic wonders responsible for fertilization, are intricately structured cells. (mensclinic-jhb.co.za)
Each sperm consists of a head, midpiece, and tail, with the head containing genetic material and an enzyme to penetrate the egg during fertilization. (mensclinic-jhb.co.za)
The sperm that successfully penetrates the egg initiates the miraculous process of fertilization, forming a zygote that evolves into a new life. (mensclinic-jhb.co.za)
At fertilization, the chromosomes in one male gamete, called a sperm (or spermatozoon), combine with the chromosomes in one female gamete, called an oocyte. (bccampus.ca)

Oxygen free radicals are naturally produced by mitochondrial and sperm plasma membrane and have beneficial and detrimental effects that cannot be overlooked. (scialert.net)
Due to the mitochondrial helix that forms around the core of the axoneme-outer dense fibers complex, the midpiece has a large diameter relative to the rest of the cell [ 10 ]. (biomedcentral.com)
To investigate the level of correlation between large-scale deletions of the mitochondrial DNA (mtDNA) with defective sperm function. (ijfs.ir)

Using this criterion, any subnormally (or borderline forms) classified sperm cells are going to be indicated as abnormal. (myhealth.gov.my)
Despite the scientific medical advances, 40 % of the infertile patients who present abnormal semen analysis remain with no definite etiologic diagnosis, making the clinical treatment limited and frustrating [3]. (wimbledon-acupuncture.co.uk)

In the epididymis several structural and biochemical changes occurs that makes the sperms fertilizable. (iasri.res.in)
In other words, a sperm cell found in the caput of the epididymis possesses characteristics that are different from sperm cells found in the corpus or cauda of the same epididymis, such as the cytoplasmic droplet position. (encyclopedia.pub)
In the initial segment of the epididymis, the sperm cell is immotile-unable to fertilize an oocyte and has a proximal cytoplasmic droplet-close to the neck [ 3 ] . (encyclopedia.pub)
Three days after the surgery, orchiectomy was executed and the testis, epididymis, and sperm were separated to each other. (biomedcentral.com)
Human sperm cell is a flagellate cell consisting of a disc-shaped head and a long tail released from the seminiferous tubule and mature in the epididymis. (biomedcentral.com)

GPx is part of the membrane defense system, protecting the integrity of the sperm cell from oxidative damage( 3 3 Drevet JR. The antioxidant glutathione peroxidase family andspermatozoa: a complex story. (scielo.br)
The glutathione peroxidase/reductase enzymes play a central role in the defense against oxidative damage in human sperm. (carmk.net)
Blueberries, known for their high antioxidant content, may protect sperm from oxidative damage, boosting their overall health. (mensclinic-jhb.co.za)

ARMC12 is mainly expressed in the midpiece of elongated and late spermatids in the human testis. (nih.gov)
Physiological evidence, including testis size relative to body weight and the volume of sperm in ejaculations, suggests that humans have experienced a low-to-intermediate level of selection pressure for sperm competition in their evolutionary history. (wikipedia.org)
In humans, testis size relative to body weight is intermediate between monogamous primates (such as gorillas) and promiscuous primates (such as chimpanzees), indicating an evolutionary history of moderate selection pressures for sperm competition. (wikipedia.org)
Any infection in testis due to presence of some bacteria also secretes liquid like seminal stain from testis which creates doubt about semen. (forensicsdigest.com)
Recent human transcriptomic analyses revealed a very large number of testis-enriched genes, many of which are involved in spermatogenesis. (biomedcentral.com)
This comprehensive transcriptomic data lead us to the question whether positive selection was a decisive force influencing the evolution and variability of testis-enriched genes in humans. (biomedcentral.com)
Episodic diversifying selection, possibly driven by sperm competition, was not an important force driving the evolution of testis-enriched genes in the human lineage. (biomedcentral.com)
MSCs significantly reversed the imbalance of glycolysis in sperm and testis induced by testicular torsion-detorsion, as evidenced by increasing the expression of phosphoglycerate kinase 2 and glyceraldehyde-3-phosphate dehydrogenase-spermatogenic, activating Akt, and increasing glycogen synthase kinase 3 (GSK3), which led to the increase in glycolysis cascades and ATP production. (biomedcentral.com)
The primordial germ cells differentiate in the testis, in these seminiferous tubules… But let me first fast forward to the end of the process and describe a complete, mature sperm cell or spermatozoon. (ussromantics.com)

Studies have found that the volume of sperm does vary between ejaculates, and that sperm produced during copulatory ejaculations are of a higher quality (younger, more motile, etc.) than those sperm produced during masturbatory ejaculates or nocturnal emissions. (wikipedia.org)
Several research findings indicate that motile and non-motile sperms can be obtained at different duration in different body cavities. (forensicsdigest.com)
The table below shows the approximate duration for which motile and non-motile sperms can be found in the body cavities of a victim of sexual crime. (forensicsdigest.com)

Sperm cells are smaller than other cell types and have a tail that moves. (healthandscience.eu)
The tail propels the sperm to the egg where it will fertilize the egg. (fertiligy.com)
Sperm is the male reproductive cell and is made up of a head, mid-piece, and tail. (whatfuture.net)
The head contains the genetic material, while the mid-piece and tail help propel the sperm forward. (whatfuture.net)
The sperm (the fruit between the reads and tail) graphics 14% posts the same length compared broader men when you was a intake, kamagra next day uk steady men build, wander consumed shaving Untreated rich in back, and how and overcome can leave procedures. (energyhousecalls.com)

It plays a key role during sperm capacitation [ 3 - 6 ] and the acrosomal exocytosis [ 7 - 10 ], where it affects different intracellular signalling pathways. (plos.org)
In this paper, we describe the capacitation phenotype of sperm lacking the long isoform of β1,4-galactosyltransferase I (GalT I), a sperm surface protein that functions as a receptor for the zona pellucida glycoprotein, ZP3, and as an inducer of the acrosome reaction following ZP3-dependent aggregation. (biologists.com)
As expected, wild-type sperm must undergo capacitation in order to bind the zona pellucida and undergo a Ca 2+ ionophore-induced acrosome reaction. (biologists.com)
By contrast, GalT I-null sperm behave as though they are precociously capacitated, in that they demonstrate maximal binding to the zona pellucida and greatly increased sensitivity to ionophore-induced acrosome reactions without undergoing capacitation in vitro. (biologists.com)
removing these decapacitating factors from wild-type sperm phenocopies the capacitation behavior of GalT I-null sperm. (biologists.com)
three co-factors normally required by wild-type sperm to achieve capacitation. (biologists.com)
Consistent with this, GalT I-null sperm have increased levels of cAMP that correlate closely with both the accelerated kinetics and co-factor-independence of GalT I-null sperm capacitation. (biologists.com)
These data suggest that GalT I may function as a negative regulator of capacitation in the sperm head by suppressing intracellular signaling pathways that promote this process. (biologists.com)
Before ejaculated sperm can complete any of these steps,they must undergo a series of biochemical, morphological and behavioral changes, collectively called capacitation. (biologists.com)

This unusual structure of sperm membrane is responsible for its flexibility and the functional ability of sperm cells. (scialert.net)

The fluid portion is known as seminal plasma and sperms are suspended in it. (iasri.res.in)
Semen also contains other liquids, known as seminal plasma, which help to keep the sperm cells viable. (forensicsdigest.com)

Intracytoplasmic sperm injection was used to treat the patients. (nih.gov)
Moreover, two patients were treated with intracytoplasmic sperm injection and achieved good outcomes. (nih.gov)
This case report detailed the course of treatment and protocol of a patient with type 1 globozoospermia using Intracytoplasmic Sperm Injection (ICSI) and oocyte activation by calcium ionophore, which yielded conception and birth of a healthy baby after six previous unsuccessful attempts, using ICSI alone. (jri.ir)
This study was conducted to evaluate in vivo and in vitro development of in vitro-matured equine oocytes fertilized by intracytoplasmic sperm injection. (bioone.org)

Sperm cells are highly sensitive to reactive oxygen species (ROS), which are produced during cellular oxidation. (mdpi.com)
Reactive oxygen species (ROS) induced lipid peroxidation is associated with sperm function. (ijbs.com)
Reactive oxygen species (ROS) play an important role in the human reproduction. (ijbs.com)

Why Does Abstinence Affect Sperm Quality? (whatfuture.net)
What Other Factors Affect Sperm Quality? (whatfuture.net)
Certain medical conditions, such as diabetes, can affect sperm quality. (whatfuture.net)
Certain medications, such as steroids and chemotherapy drugs, can affect sperm quality. (whatfuture.net)

Therefore, a comparative study of these two bacteria on semen parameters and fertility results of sperm in laboratory conditions would help to better understand the potential effects of bacteria on sperm fertility potential. (ecerm.org)

Studies show that in around 50% of the cases where a couple is infertile, the man's sperm cell DNA is not properly protected. (healthandscience.eu)
When it comes to reproduction, a man's sperm plays a vital role. (whatfuture.net)

Sperm exit the scrotum through the ductus deferens, which is bundled in the spermatic cord. (bccampus.ca)

This study aimed to evaluate the effects of bacteriospermia on sperm parameters and clinical outcomes in semen samples infected with two common bacteria ( Staphylococcus saprophyticus and Escherichia coli ) in northern Iran. (ecerm.org)
However, controversy exists regarding the role of different types of bacteria in decreasing sperm parameters. (ecerm.org)
Therefore, male fertility may be inhibited by the negative effects of bacteriospermia and leukocytospermia on sperm parameters [ 2 ]. (ecerm.org)
In recent years, the detrimental effects of different types of bacteria strains and/or leukocytes on some sperm parameters were studied [ 3 ]. (ecerm.org)
Several studies have investigated the effects of different bacteria on semen parameters and male fertility. (ecerm.org)
Oxidative stress has numerous effects, including increased apoptosis, reduced motion parameters, and reduced sperm integrity. (mdpi.com)
We aimed to evaluate the relationship of MDA and GPx levels with sperm parameters. (ijbs.com)

The total volume of semen for each ejaculation of a human male averages between 2 and 5 ml. (forensicsdigest.com)

It has been suggested by some authors that penis size is constrained by the size of the female reproductive tract (which, in turn is likely constrained by the availability of space in the female body), and that longer penises may have an advantage in depositing semen closer to the female cervix. (wikipedia.org)
Semen is a thick, yellowish white, glairy, opalescent, secretion having a characteristic odour known as seminal odor.It is also called seminal fluid, fluid that is ejaculated from the male reproductive tract and that contains sperm cells, which are capable of fertilizing the female eggs. (forensicsdigest.com)
The sperm can survive for up to two days outside the male body and 72 hours in the female reproductive tract. (fertiligy.com)
Sperm cells can live inside the female reproductive tract for up to five days. (whatfuture.net)
The lifespan of sperm depends on the conditions of the reproductive tract and the environment of the sperm cells. (whatfuture.net)
The function of the male reproductive system ( Figure 1 ) is to produce sperm and transfer them to the female reproductive tract. (bccampus.ca)

All cells in the human body have a nucleus that contains our genetic coding (DNA), which is our cellular blueprint. (healthandscience.eu)
Sperm consists of several parts, including a head cap that contains the nucleus and a midpiece that contains the genetic material. (fertiligy.com)

Finding sperm cells in body cavities of a victim of sexual crime is the utmost priority for obvious reasons. (forensicsdigest.com)
When a man ejaculates his semen into the vagina of a woman, somewhere between 60 and 450 million sperm cells are dispatched. (healthandscience.eu)
The more healthy sperm cells a man is able to produce, and the faster they are able to swim, the greater are the chances that one of them reaches its target - the egg - and fertilizes it. (healthandscience.eu)
A new, Greek study of 225 men, who frequented a fertility clinic in Athens, showed that those who consumed a predominantly Mediterranean diet had more active sperm cells compared with those who ate a less healthy diet. (healthandscience.eu)
This is most likely because this type of diet is rich in vitamins, minerals, and essential fatty acids that protect and nourish the sperm cells. (healthandscience.eu)
The content of nutrients in the diet affects the immature sperm cells in the testicles as well as those that are fully matured, which require a lot of energy and protection of their genetic payload. (healthandscience.eu)
What is more, sperm cells only contain very little cytoplasm that normally produces enzymes, which help repair cellular DNA. (healthandscience.eu)
In other words, sperm cells are not able to repair their own DNA damage and are therefore highly vulnerable to oxidative stress caused by free radicals. (healthandscience.eu)
This makes the sperm cells vulnerable to something called DNA fragmentation, which not only impairs the sperm's ability to swim but may also mean that the first sperm cell to reach the egg is not necessarily the most suited one. (healthandscience.eu)
Therefore, it is vital to protect the sperm cells and their DNA against free radicals and oxidative stress, and our only shield against these threats are antioxidants such as vitamin A, vitamin C, vitamin E, selenium, and zinc. (healthandscience.eu)
Did you know that sperm cells are extremely vulnerable towards oxidative stress caused by free radicals, and that stress, poisoning, tobacco smoke, and radiation increase the free radical load? (healthandscience.eu)
All human cells contain selenium . (healthandscience.eu)
Sperm cells are particularly dependent on selenium, as this nutrient is a vital part of (seleno)proteins in the filament, which delivers the forward propulsion. (healthandscience.eu)
Co-staining sperm with SYBRI4 and PI readily identifies cells with intact membranes versus membrane compromised cells. (purdue.edu)
Figure 4: Two parameter green (log) versus red (linear) fluorescence isometric displays of 10,000 cells collected from fertile (A) and less fertile (B) bull sperm stained with SYBRI4 and counterstained with Propidium Iodide (PI). (purdue.edu)
The reproductive organs of mammals produce the gametes (sperm and egg cells), help them fertilize and then support the developing embryo. (wikibooks.org)
Sperm and egg cells combine to form a diploid organism with 46 chromosomes. (fertiligy.com)
Sperm cells are produced in the testicles and released during ejaculation. (whatfuture.net)
For example, sperm cells will live longer in an acidic environment than in an alkaline environment. (whatfuture.net)
kamagra jelly packets During Fernandez-Fournier We time, scar cells question of kamagra pills south africa cause alarm, sperm. (energyhousecalls.com)
Other recent studies verified the presence of PAPP-A mRNA in granulosa cells of humans, monkeys, cattle, mice, and pigs. (bioone.org)
We previously reported that mesenchymal stem cells (MSCs), through local injection upon testicular torsion-detorsion, restored the spermatogenesis without differentiation into sperm. (biomedcentral.com)
Spermatogonia are undifferentiated male germ cells, or sperm cells. (ussromantics.com)
After being released in the lumen of the seminif- erous tubules, sperm cells have to accomplish several challenging tasks before reaching and fertilizing the egg. (123dok.net)
Special proteins -- known as membrane transporters -- are key to the mobility of sperm cells. (womenshealthdaily.com)
Unique for its role in human reproduction, a gamete is a specialized sex cell carrying 23 chromosomes-one half the number in body cells. (bccampus.ca)

New research shows that epigenetic factors (factors that affect the environment of the sperm cell) determine sperm health and are therefore crucial for activating the genes of the sperm cell so the fetus can develop. (healthandscience.eu)

Sperm consists of DNA and contains the genetic material of the male. (fertiligy.com)

Sperm competition is a form of post-copulatory sexual selection whereby male ejaculates simultaneously physically compete to fertilize a single ovum. (wikipedia.org)
Testicular sperms are not capable of fertilizing ovum. (iasri.res.in)
In biological terms sexual reproduction involves the union of gametes - the sperm and the ovum - produced by two parents. (wikibooks.org)

It may be caused by a lack of certain nutrients and exposure to different environmental factors, but, fortunately, it possible to improve sperm quality and increase the chances of conception by means of relevant dietary adjustments and the use of specific supplements. (healthandscience.eu)
Studies show that anti-oxidant supplementation - glutathione in particular - can improve sperm quality, and possibly increase your chances of conceiving. (carmk.net)
Because men with high levels of ROS have a seven-fold lower likelihood of inducing a pregnancy than men with lower levels, researchers recommend that treatment for infertile men should include strategies to reduce oxidative stress and improve sperm quality. (carmk.net)

Seminal plasma also contains some specific bio-molecules that are required for sperm metabolism. (iasri.res.in)

Our findings prove for the first time that defects in ARMC12 cause asthenozoospermia and multiple midpiece defects in humans. (nih.gov)
2001). Sperm Morphological defects Related to Environment, Lifestyle and Medical History of 1001 male Partners of Pregnant Women from Four European Cities. (myhealth.gov.my)

MPVs were previously considered distinct from CDs and characteristic of immature sperm [ 13 ]. (biomedcentral.com)

In humans, it leads to widely heterogenous morphological pattern, with many cellular abnormalities which may be associated with sperm dysfunction. (myhealth.gov.my)
To evaluate the effect of Chinese Traditional Medicine, acupuncture and moxa treatment, on the semen quality in patients with semen abnormalities. (wimbledon-acupuncture.co.uk)
On the other hand, some authors have successfully treated patients with varicocele or prostatitis and semen abnormalities using techniques of the Chinese Traditional Medicine [4-7]. (wimbledon-acupuncture.co.uk)

Understanding the significance of sperm health is crucial for couples looking to conceive and embark on the beautiful path of starting a family. (mensclinic-jhb.co.za)

Toxins found in certain chemicals, pesticides, and pollutants may disrupt hormonal balance and impair sperm quality. (mensclinic-jhb.co.za)

The seminal vesicles produce a yellowish viscous fluid rich in fructose and other substances that makes up about 70% of human semen. (forensicsdigest.com)
The seminal vesicles and prostate gland add fluids to the sperm to create semen. (bccampus.ca)

Each ejaculation contains normally 200 to 300 million sperm. (forensicsdigest.com)

The highest concentrations are found in reproductive glands and semen. (healthandscience.eu)

Evidence suggests that diet plays a vital role in sperm quality. (healthandscience.eu)
Environmental conditions play a substantial role in sperm health. (mensclinic-jhb.co.za)

Now, new research is shedding light on what may be going wrong in the process of sperm formation, leading to potential theories on possible treatments. (womenshealthdaily.com)
In this section, we examine each of these different structures, and discuss the process of sperm production and transport. (bccampus.ca)

The most likely explanation for the decrease in sperm quality after a few days is that the seminal fluid, which helps nourish and protect the sperm, is depleted. (whatfuture.net)
Both unilateral and bilateral cryptorchidism are associated with a decrease in sperm production and semen quality, regardless of the timing of orchidopexy. (medscape.com)
The decrease in sperm production may not be realized until 1-3 months later. (medscape.com)

Microbiological tests were performed to isolate and identify organisms from 435 semen samples from infertile couples. (ecerm.org)

Several studies have also demonstrated that multiple mtDNA deletions are associated with defective sperm function and diminish fertility in men (14, 21-25). (ijfs.ir)
High lipid peroxidation as represented by MDA levels may cause changes in the sperm and diminish fertility [ 5 ]. (ijbs.com)

This suggests that, at least within males, there is evidence of allocation of higher quality sperm production for copulatory purposes. (wikipedia.org)
Researchers have suggested that males produce more and higher quality sperm after spending time apart from their partners, implying that males are responding to an increased risk of sperm competition, although this view has been challenged in recent years. (wikipedia.org)
Existing evidence suggests a connection between bacteriospermia and alterations of semen quality. (ecerm.org)
Although there can be many underlying causes, poor sperm quality is an increasing problem. (healthandscience.eu)
The study supports earlier findings, where scientists have observed that men who eat a lot of whole-grain, fruit, vegetables, legumes, and fish have better sperm quality. (healthandscience.eu)
Did you know that poor sperm quality increases the risk of miscarriage? (healthandscience.eu)
Men with poor sperm quality should attempt to eat a healthy and balanced diet, whether it is Mediterranean-style or not. (healthandscience.eu)
This is an important question to consider, as sperm quality can have a direct impact on fertility. (whatfuture.net)
In this blog post, we'll explore the answer to this question and provide you with some helpful tips to ensure the best possible sperm quality. (whatfuture.net)
Abstinence can be beneficial in helping couples who are trying to conceive, as it can help reduce stress levels, which can have a negative effect on sperm quality. (whatfuture.net)
In addition to abstinence, a variety of factors can affect the quality of sperm. (whatfuture.net)
Smoking, drinking alcohol, and using recreational drugs can have a negative effect on sperm quality. (whatfuture.net)
Why are Antioxidants Important for Sperm Quality? (carmk.net)
Why is Glutathione important for Sperm Quality and Fertility? (carmk.net)
Does electromagnetic radiation emitted by mobile phones affect semen quality? (womenshealthdaily.com)
While various environmental and lifestyle factors have been proposed to explain the decline in semen quality observed over the last fifty years, the role of mobile phones has yet to be demonstrated. (womenshealthdaily.com)
Central to this aspiration is the vital role of male reproductive health, particularly the quality and quantity of sperm. (mensclinic-jhb.co.za)
Vitamins C and E, along with selenium and coenzyme Q10, are powerful antioxidants that can preserve sperm quality. (mensclinic-jhb.co.za)
Excessive alcohol consumption and tobacco use can negatively impact sperm quality. (mensclinic-jhb.co.za)
A complete assessment of the reproductive organs and of semen quality should be performed routinely on all bucks before the breeding season, whereas does may be assessed only if they do not conceive. (msdvetmanual.com)

The membrane that constitutes the swine sperm is rich in polyunsaturated fatty acids, which is important to maintain sperm fluidity and flexibility( 1 1 Surai, PF. (scielo.br)
Lipid peroxidation damages the sperm cell membrane. (carmk.net)

Sperm cell membranes are high in polyunsaturated fatty acids and are sensitive to oxygen free radical induced damage mediated by lipid peroxidation. (scialert.net)

If stain is wet then bacterial growth is started and putrefaction may occur due to presence of protein in semen. (forensicsdigest.com)
This protease activity has recently been ascribed to serine metalloprotease(s), including pregnancy-associated plasma protein-A (PAPP-A), which was first detected in human follicular fluid nearly 20 yr ago. (bioone.org)

Ali Hassan, H. Epididymal Sperm of Canine and Feline. (encyclopedia.pub)
Epididymal Sperm of Canine and Feline" Encyclopedia , https://encyclopedia.pub/entry/15218 (accessed November 30, 2023). (encyclopedia.pub)
Moreover, in cats, a species notoriously difficult to collect semen from, epididymal sperm may serve as an extra and easily accessible source of gametes [ 2 ] . (encyclopedia.pub)

In normal cell biology, ROS levels increase with a decreasing antioxidant response, resulting in oxidative stress which threatens sperm biology. (mdpi.com)
To protect sperm from damage, the body depends on powerful antioxidant enzymes in the body such as superoxide dismutase (SOD), catalase, and glutathione peroxidase/reductase (GPX/GRD). (carmk.net)
In some groups, higher levels of ROS were associated with lower sperm counts and defective sperm structure, while lower antioxidant levels correlated with reduced sperm movement. (carmk.net)

The droplet is located in the proximal region of the midpiece in a caput-spermatozoon and in the distal region of the midpiece in a corpus-spermatozoon [ 3 ] . (encyclopedia.pub)

Anatomy6

Diseases1

Analytical, Diagnostic and Therapeutic Techniques and Equipment4

Phenomena and Processes6

Motility35

Spermatozoa25

Morphology7

Concentration14

Mitochondria8

Ejaculate5

Mammalian4

Infertility12

Testes7

Associated with reduced sperm1

Maturation3

Fertilization11

Mitochondrial3

Abnormal2

Epididymis5

Oxidative damage3

Testis9

Motile3

Tail5

Capacitation9

Structure of sperm1

Known as seminal plasma2

Intracytoplasmic4

Reactive3

Affect sperm4

Fertility potential1

Man's sperm2

Scrotum1

Parameters7

Volume of semen1

Reproductive tract6

Nucleus2

Cells26

Environment of the sperm1

Consists1

Ovum3

Improve sperm quality3

Seminal plasma1

Defects2

Immature1

Abnormalities3

Crucial1

Impair1

Vesicles2

Ejaculation1

Glands1

Role in sperm2

Process of sperm2

Decrease in sperm3

Infertile couples1

Diminish fertility2

Quality20

Membrane2

Lipid1

Protein2

Epididymal3

Antioxidant3

Distal1