• Since TFC opened its doors more than 40 years ago, we have helped our patients deliver 23,000 miracles through IVF, IUI, egg donation, intracytoplasmic sperm injection, and reconstructive fertility surgery. (txfertility.com)
  • Intracytoplasmic sperm injection ( ICSI / ˈ ɪ k s i / IK -see ) is an in vitro fertilization (IVF) procedure in which a single sperm cell is injected directly into the cytoplasm of an egg . (wikipedia.org)
  • Schematic image of intracytoplasmic sperm injection in the context of IVF . (wikipedia.org)
  • Depending on the results of diagnostic tests, assisted reproductive technologies (ARTs), such as in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI), are available for these couples. (jmir.org)
  • Intracytoplasmic Sperm Injection (ICSI) for the treatment of male factor infertility. (lawinsider.com)
  • Isolated teratozoospermia does not affect in vitro fertilization outcome and is not an indication for intracytoplasmic sperm injection. (myhealth.gov.my)
  • In terms of insemination, ICSI needs only one sperm cell per oocyte , while IVF needs 50,000-100,000. (wikipedia.org)
  • This condition is called non-obstructive or secretory azoospermia, as opposed to obstructive azoospermia, in which complete sperm production does occur in the testicles, and potentially fertilizing spermatozoa can be obtained by testicular sperm extraction (TESE) and used for ICSI. (wikipedia.org)
  • Moreover, the distinction between living round spermatids, to be used in ROSI, and dead round spermatids, to be discarded, needs specific methods and skills, not required in the case of ICSI where sperm cell viability can be easily evaluated on the basis of sperm motility in most cases. (wikipedia.org)
  • ICSI procedure: the oocytes will be placed into the standard ICSI petri dish and they will be injected with sperm with normal morphology. (who.int)
  • 0.05) decreased sperm motility, viability, mitochondrial activity and acrosome integrity but had no detrimental effect at lower doses. (nih.gov)
  • and sperm viability and acrosome integrity at ≥ 100 µg/mL GLY-equivalent concentration as early as 1 h of incubation. (nih.gov)
  • With SLIM, there is also allowace for the measurement of the dry mass (non-aqueous content) of spermatozoa, which may be a new label-free marker for sperm viability. (phioptics.com)
  • CIFTCI, H.B. and ZULKADIR, U. . The effect of oestradiol-17 β on the motility, viability and the acrosomal status of bull sperm . (scielo.org.za)
  • The aim of this study was to test the effect of oestradiol-17β (E 2 ) on the motility, viability and the acrosomal status of bull sperm in vitro . (scielo.org.za)
  • Lower doses of E 2 (2 and 4 µg/mL) did not affect viability of sperm, but a high dose of E 2 (8 µg/mL) caused reductions in viability at 4 and 24 h of incubation. (scielo.org.za)
  • In mammals, most histone proteins are lost during sperm development, eventually to be replaced by protamines. (i-sis.org.uk)
  • Therefore, this study aimed to improve spermatozoa vitrification using a mitochondria-targeted antioxidant (mitoquinone, MitoQ), reveal ultrastructural changes in the spermatozoa due to the use of a permeable cryoprotectant, and report alterations of functional proteins during the spermatozoa vitrification process. (uni-koeln.de)
  • These findings suggest that while channel proteins found in sperm cells from different species look similar and serve similar roles, they are activated in ways that can be very different. (elifesciences.org)
  • Proteins found in sperm. (bvsalud.org)
  • Sperm-specific proteins are also important for early EMBRYO DEVELOPMENT. (bvsalud.org)
  • In the case of environmental toxins, Michael Skinner's reproductive biology lab at Washington State University Pullman in the United States first reported in 2005 that injecting pregnant rats with endocrine disruptor fungicide vinclozolin caused sperm abnormalities that persisted in the male progeny for at least 4 generations [4]. (i-sis.org.uk)
  • What Are Sperm Abnormalities? (glutenfreeworks.com)
  • What Are Sperm Abnormalities In Celiac Disease and/or Gluten Sensitivity? (glutenfreeworks.com)
  • In humans, it leads to widely heterogenous morphological pattern, with many cellular abnormalities which may be associated with sperm dysfunction. (myhealth.gov.my)
  • 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)
  • In his study, Barrès and colleagues compared specific epigenetic marks in the ejaculate of lean and obese men (men were the focus because sperm is much easier to obtain than eggs). (sciencedaily.com)
  • This technique can be used to enable genetic fatherhood to some men who have no spermatozoa in the ejaculate (azoospermia) and in whom spermatozoa cannot be obtained surgically from the testicles. (wikipedia.org)
  • Typically, men with SCO syndrome present between age 20-40 years for evaluation of infertility and are found to be azoospermic, a term describing the absence of sperm in the ejaculate. (medscape.com)
  • In each of the inseminations, fresh ejaculate was processed in an attempt to remove virus from spermatozoa to avoid HIV-1 transmission. (cdc.gov)
  • In October and December, fresh ejaculate was fractionated by centrifugation through a discontinuous density gradient of polyvinylpyrrolidone-coated silica particles (Percoll((R))**) to separate motile spermatozoa from other cells and seminal plasma. (cdc.gov)
  • It is defined as having less than 20 million spermatozoa per ml of ejaculate. (bionity.com)
  • 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)
  • During the incubation, the number of motile, viable sperm and the number of sperm possessing lost/damaged acrosomes, cytoplasmic droplets and coiled tails were counted at 0, 4, 18 and 24 h of incubation. (scielo.org.za)
  • We carried out two experiments: (1) to assess the effects of the two freezing-thawing cycles on sperm quality and to analyze three different elapsed times between freezing-thawing cycles (30, 90 and 180 min), and (2) to analyze the use of PureSperm between freezing-thawing cycles to select a more motile and viable sperm subpopulation which better survived first freezing. (diva-portal.org)
  • Infertility in patients with Klinefelter syndrome: optimal timing for sperm and testicular tissue cryopreservation. (springer.com)
  • DNA integrity and to a lesser degree the simple assessment of the DFPM of thawed sperm may be reliable indicators of sperm integrity for the development and the rapid assessment of fish sperm cryopreservation protocols. (scialert.net)
  • Sperm cryopreservation can facilitate artificial reproduction and rapid output of ornamental fish with desirable traits in a commercial fish hatchery unit. (scialert.net)
  • A successful cryopreservation procedure involves the use of a solution that maintains sperm inactivity without compromising the cell membrane integrity and in combination with cryoprotectants, protecting sperm from injury during the freeze-thawing cycle. (scialert.net)
  • Any changes in the motility patterns (for example swimming speed and forward or progressive movement) after a freeze-thaw cycle would indicate a cryopreservation induced alteration in the swimming ability of sperm. (scialert.net)
  • clarification needed] The mammalian sperm cell can be divided in 2 parts: Head: contains the nucleus with densely coiled chromatin fibers, surrounded anteriorly by a thin, flattened sac called the acrosome, which contains enzymes used for penetrating the female egg. (wikipedia.org)
  • The main sperm function is to reach the ovum and fuse with it to deliver two sub-cellular structures: (i) the male pronucleus that contains the genetic material and (ii) the centrioles that are structures that help organize the microtubule cytoskeleton. (wikipedia.org)
  • Coitus interruptus prevents sperm from entering the woman's vagina, thereby preventing contact between spermatozoa and the ovum. (cdc.gov)
  • 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)
  • We previously reported that cAMP efflux by Multidrug Resistance Protein 4 (MRP4)occurs during sperm capacitation and the pharmacological blockade of this inhibits the process. (conicet.gov.ar)
  • Moreover, the supplementation of incubationmedia with cAMP abolishes the inhibition and leads to sperm capacitation, suggesting that extracellular cAMP regulates crucial signalling cascadesinvolved in this process.STUDY DESIGN, SIZE, DURATION: Bovine sperm were selected by the wool glass column method, and washed by centrifugation inBSA-Free Tyrode?s Albumin Lactate Pyruvate (sp-TALP). (conicet.gov.ar)
  • Our results showed that external cAMP induces sperm capacitation, depending upon the action of PLC. (conicet.gov.ar)
  • Thus, OP exposure could interfere with sperm chromosome segregation and increase the risk for genetic syndromes, such as Turner's. (cdc.gov)
  • The andromerogones for 5 sperm species showed a half of their respective diploid chromosome numbers without chromosome elimination. (bioone.org)
  • This method is applicable for analysis of the haploid male chromosome complement in sea urchin species for which only sperm can be obtained. (bioone.org)
  • Durand and his colleagues tried to demonstrated the feasibility of the idea by making sperm using testicular tissue from rats young enough to represent the boys who would benefit from the technique. (newscientist.com)
  • However, Poisson regression analysis adjusted for age, alcohol intake, and sperm concentration showed significant associations between OP metabolite concentrations and increased frequency of sperm aneuploidies. (cdc.gov)
  • 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)
  • Oligospermia has many different causes, as many different medical conditions can reduce sperm concentration. (bionity.com)
  • From 1 to 24h after administration we assessed the number and concentration of spermatozoa in spermic urine and in holding water, and in urine the percentage of motile spermatozoa and their progressive motility. (bvsalud.org)
  • Sperm (PL: sperm or sperms) is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger, female reproductive cell and a smaller, male one). (wikipedia.org)
  • To learn more about the epigenetic-offspring connection, his lab is now collaborating with a fertility clinic to study epigenetic differences in discarded embryos generated from the sperm of men with various degrees of body weight. (sciencedaily.com)
  • For these reasons fertility in KS is a major challenge: it is essential to locate the optimal timing to search spermatozoa in KS and the most appropriate technique and modality to give KS subjects the best chance to reach fertility. (springer.com)
  • More studies of fertility outcomes in large populations are required to refine the application of CASA to measuring sperm morphology. (myhealth.gov.my)
  • The presence of spermatozoa is associated with the best prognosis for future fertility, although clear fluid without spermatozoa also portends a good outcome. (medscape.com)
  • Using this criterion, any subnormally (or borderline forms) classified sperm cells are going to be indicated as abnormal. (myhealth.gov.my)
  • Human sperm cells can survive within the female reproductive tract for more than 5 days post coitus. (wikipedia.org)
  • In pesticide-exposed queens, reproductive anatomy (ovaries) and physiology (spermathecal-stored sperm quality and quantity), rather than flight behaviour, were compromised and likely corresponded to reduced queen success (alive and producing worker offspring). (nature.com)
  • Recent research also has thrown lights upon a significant role of orexins, especially orexin A, in regulation of male reproductive functions owing to their receptor expressions in vital testicular cells, such as Leydig cells, Sertoli cells as well as spermatozoa at different developmental stages, even in the epididymis and penis. (researchgate.net)
  • Animals produce motile sperm with a tail known as a flagellum, which are known as spermatozoa, while some red algae and fungi produce non-motile sperm cells, known as spermatia. (wikipedia.org)
  • Sperm cells form during the process known as spermatogenesis, which in amniotes (reptiles and mammals) takes place in the seminiferous tubules of the testes. (wikipedia.org)
  • Sperm cells cannot divide and have a limited lifespan, but after fusion with egg cells during fertilisation, a new organism begins developing, starting as a totipotent zygote. (wikipedia.org)
  • Sperm cells are carried out of the male body in a fluid known as semen. (wikipedia.org)
  • The sperm cells of lean and obese men possess different epigenetic marks, notable at gene regions associated with the control of appetite. (sciencedaily.com)
  • This is because the acrosome reaction has to take place and thousands of sperm cells have to be involved in IVF. (wikipedia.org)
  • [6] Even with severe teratozoospermia, microscopy can still detect the few sperm cells that have a "normal" morphology, allowing for optimal success rate. (wikipedia.org)
  • The number of sperm cells with lost acrosomes was significantly high in control group at 24 h of incubation. (scielo.org.za)
  • The number of sperm cells possessing proximal and distal cytoplasmic droplets and the number of sperm cells bearing coiled tails were not altered by any of the treatments. (scielo.org.za)
  • [ 1 ] Sertoli cells help to make up the blood-testis barrier and are responsible assisting with sperm production. (medscape.com)
  • The objective of this study was to identify the PDE10A isoforms expressed in the testis and germ cells, and to determine the presence and localization of PDE10A in mature spermatozoa. (plos.org)
  • Technically, though, spermatozoa are also foreign cells. (zmescience.com)
  • In general, sperm cells become attracted to egg cells by various chemical or physical signals. (elifesciences.org)
  • In 2009, researchers identified a potassium ion channel, called CNGK, that starts the electrical signal in the sperm cells of sea urchins. (elifesciences.org)
  • This channel is activated by signalling molecules inside cells, called 'cyclic nucleotides', and its activity ultimately leads to calcium ions flowing into the sperm cell's tail. (elifesciences.org)
  • including some of the researchers involved in the 2009 work - now report that the CNGK channel also exists in the sperm cells of a freshwater fish, the zebrafish. (elifesciences.org)
  • Unexpectedly, the CNGK channel is located in the heads of this fish's sperm cells rather than in the tails. (elifesciences.org)
  • Produce and store millions of sperm cells called spermatozoa. (glutenfreeworks.com)
  • means mature spermatozoa or precursor cells such as spermatids and spermatocytes. (lawinsider.com)
  • In addition, assays forbinding to oviductal epithelial cells and IVF were carried out to test the effect of cAMP compared with other known capacitant agents such asheparin (60 μg/ml) and bicarbonate (40 mM).PARTICIPANTS/MATERIALS, SETTING, METHODS: Straws of frozen bovine semen (20?25 × 106 spermatozoa/ml) were kindlyprovided by Las Lilas, CIALE and CIAVT Artificial Insemination Centers. (conicet.gov.ar)
  • The morphology of sperm cells is the end result of a highly complex process of cellular modifications occurring during spermiogenesis. (myhealth.gov.my)
  • Through a 20-year project, the French researchers say they have made human and rat sperm, starting with testicular cells called spermatogonia. (newscientist.com)
  • By taking and freezing biopsies containing spermatogonia before boys begin treatment, the technique could make sperm from these cells in the future when they decide to have children. (newscientist.com)
  • This study is encouraging, but the cells isolated are not even closely similar to mature or immature sperm, either in the rat or human," says Jacob Hanna of the Weizmann Institute of Science in Rehovot, Israel, who is part of another team attempting to grow human sperm in the lab. (newscientist.com)
  • But these comparisons are not enough to demonstrate that the lab-grown cells are fully developed, healthy sperm, says Hanna. (newscientist.com)
  • Normal sperm cells have an oval-shaped head with a cap-like covering called the acrosome. (medlineplus.gov)
  • The sperm cells of males with globozoospermia, however, have a round head and no acrosome. (medlineplus.gov)
  • The DPY19L2 gene provides instructions for making a protein that is found in developing sperm cells. (medlineplus.gov)
  • As a result, sperm cells have no acrosome and do not elongate properly. (medlineplus.gov)
  • Tail: also called the flagellum, is the longest part and capable of wave-like motion that propels sperm for swimming and aids in the penetration of the egg. (wikipedia.org)
  • In the spermatid stage, the sperm develops the familiar tail. (wikipedia.org)
  • The cytoplasmic droplet always attached to the mid-piece of the spermatozoon without migrating down the sperm tail. (frontiersin.org)
  • This influx of calcium ions in turn controls the beating of the tail and, thereby, steers the sperm cell towards the egg. (elifesciences.org)
  • Will show spermatozoa red bodies with the midpiece and tail sections green. (sargentwelch.com)
  • Each round spermatid then undergoes dramatic changes in its cellular morphology (spermiogenesis) to form first an elongating spermatid and finally a spermatozoon. (jci.org)
  • 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)
  • [3] The clinical potential of ROSI in the treatment of male infertility due to the total absence of spermatozoa has been corroborated recently by a publication reporting on the postnatal development of 90 babies born in Japan and 17 in Spain. (wikipedia.org)
  • This procedure is most commonly used to overcome male infertility problems, although it may also be used where eggs cannot easily be penetrated by sperm, and occasionally in addition to sperm donation . (wikipedia.org)
  • A recurrent deletion of DPY19L2 causes infertility in man by blocking sperm head elongation and acrosome formation. (medlineplus.gov)
  • A small dose of E 2 (2 µg/mL) had a beneficial effect on the motility and acrosome integrity of bull sperm in vitro . (scielo.org.za)
  • Studies inother species and with fresh samples are needed to extrapolate these data.WIDER IMPLICATIONS OF THE FINDINGS: These findings strongly suggest an important role of extracellular cAMP in the regulationof the signalling pathways involved in the acquisition of bull sperm fertilizing capability. (conicet.gov.ar)
  • Organophosphorous pesticide exposure increases the frequency of sperm sex null aneuploidy. (cdc.gov)
  • Therefore, we aimed to assess the frequency of sperm aneuploidy (X, Y, and 18) and its relationship with urinary OP metabolites in agricultur al workers. (cdc.gov)
  • We performed multicolor fluorescence in situ hybridization on samples from nine men obtained before and during the pesticide spraying season to assess sperm aneuploidy. (cdc.gov)
  • Aneuploidies were found in 0.67% of total sperm nuclei. (cdc.gov)
  • The protocol using 1.20 µg gâ »¹ LHRHa gave the highest total sperm numbers (650 × 106) and the highest percentage (40%) of samples with sperm concentrations above 200 × 106 mLâ »¹. (bvsalud.org)
  • Assessing approximately 200 spermatozoa and the value of normal sperm is calculated in percentage. (myhealth.gov.my)
  • He also says that comparing the physical features of the lab-grown and normal sperm was adequate proof. (newscientist.com)
  • The sperm subpopulation distribution changes according to the frame rate used. (scielo.sa.cr)
  • To evaluate the effect of vaginal lubricants Pre-Seed, FemGlide, Astroglide, and Replens on human sperm motility and chromatin integrity. (nih.gov)
  • Pre-Seed does not cause a significant decrease in progressive sperm motility or chromatin integrity in contrast to other lubricants used by couples. (nih.gov)
  • In a similar fashion, GLY and Roundup did not inflict any detrimental effect on sperm DNA integrity. (nih.gov)
  • The results indicate that sublethal effects during the freeze-thawing procedure compromised sperm fertilising ability, DNA integrity, velocity linearity and the duration of swimming. (scialert.net)
  • 0.05) correlation between DNA integrity and the maximum Duration of Forward Progressive Swimming (DFPS) ability of cryopreserved goldfish sperm. (scialert.net)
  • DNA integrity of sperm estimated on the basis of single gel electrophoresis and DNA damage, especially single and double strand breaks ( Warnecke and Pluta, 2003 ) are reflected in a comet like dispersion of the DNA fragments. (scialert.net)
  • Primed B. bufo produced spermatozoa with significantly higher percentage motility, but not progressive motility, membrane integrity, or abnormal spermatozoa than unprimed males. (bvsalud.org)
  • In mammals, sperm is stored in the epididymis and is released from the penis during ejaculation in a fluid known as semen. (wikipedia.org)
  • Spermatogenesis in adult mammals is highly organized, with the goal being continual sperm production. (jci.org)
  • In mammals, adenosine 3', 5'-cyclic monophosphate (cAMP) is known to play highly important roles in sperm motility and acrosomal exocytosis. (plos.org)
  • In sperm of marine invertebrates and mammals, Ca 2+ signalling has been intensely studied, whereas for fish little is known. (elifesciences.org)
  • A spermatozoon is a highly differentiated cell developed from a spermatid through spermiogenesis in the convoluted seminiferous tubule of the testis. (frontiersin.org)
  • Goupil S, Maréchal L, El Hajj H, Tremblay M-È, Richard FJ, Leclerc P (2016) Identification and Localization of the Cyclic Nucleotide Phosphodiesterase 10A in Bovine Testis and Mature Spermatozoa. (plos.org)
  • It can take at least a dozen years before puberty sets in and sperm is finally produced by the male testis. (zmescience.com)
  • Sperm counts may be slightly low if one testis is undescended but are almost always very low if both are undescended. (msdmanuals.com)
  • A widespread hypothesis states that sperm evolved rapidly, but there is no direct evidence that sperm evolved at a fast rate or before other male characteristics. (wikipedia.org)
  • [2] In the first place, as compared to spermatozoa, round spermatids do not possess easily perceptible morphological characteristics and are immotile. (wikipedia.org)
  • Hanna says that the study relies on comparing the physical characteristics of the lab-grown sperm with natural healthy sperm, and on confirming activity in certain genes linked with various stages in sperm maturity. (newscientist.com)
  • Still, their use was not reported in vitrified human spermatozoa. (uni-koeln.de)
  • Japanese researchers made mouse sperm in 2011 , as did Chinese researchers earlier this year , but the French team is the first to claim the step of making human spermatozoa. (newscientist.com)
  • The objective of this study was to analyze the same sperm samples using two high-resolution methods: spatial light interference microscopy (SLIM) and atomic force microscopy (AFM) to determine if with one method there was more timely and different information obtained than the other. (phioptics.com)
  • To determine the optimal frame rate frequency on boar sperm kinetics using a commercial CASA-Mot system and to analyze the distribution of sperm subpopulations with the optimal FR. (scielo.sa.cr)
  • The optimal frame rate to analyze sperm kinematics variables in boar semen with a CASA-Mot system was 200 fps. (scielo.sa.cr)
  • Evidence thus implicates participation of orexins in steroidogenesis, spermatogenesis, transportation and maturation of sperm as well as in the control of penile function. (researchgate.net)
  • The DPY19L2 protein is involved in the development of the acrosome and elongation of the sperm head, which are integral steps in sperm cell maturation. (medlineplus.gov)
  • We developed a method for preparing male chromosomes from sea urchin hybrid andromerogones created with cryopreserved sperm. (bioone.org)
  • In sea urchin sperm, a cyclic nucleotide-gated K + channel (CNGK) mediates a cGMP-induced hyperpolarization that evokes Ca 2+ influx. (elifesciences.org)
  • It is generally accepted that isogamy is the ancestor to sperm and eggs. (wikipedia.org)
  • However, there are no fossil records for the evolution of sperm and eggs from isogamy leading there to be a strong emphasis on mathematical models to understand the evolution of sperm. (wikipedia.org)
  • The "spinning" mode probably guides sperm into the micropyle, a narrow entrance on the surface of fish eggs. (elifesciences.org)
  • Sperm , egg and/or inseminated egg procurement and processing, and banking of sperm or inseminated eggs, to the extent such costs are not covered by the donor's insurer, if any.5. (lawinsider.com)
  • To make "unimpeachable claims", the team would have to prove that the sperm were able to fertilise eggs, which could have been attempted with the synthetic rat sperm. (newscientist.com)
  • The fraction containing motile spermatozoa was washed twice in buffer and introduced into the woman's uterus through a catheter. (cdc.gov)
  • By contrast, 5 weeks of RF-EME exposure adversely impacted the vitality and motility profiles of mature epididymal spermatozoa. (nature.com)
  • The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell with 46 paired chromosomes. (wikipedia.org)
  • We also reveal using a combination of immunological techniques and proteomics analytical tools that the PDE10A isoform X4 is present in the area of the developing acrosome of spermatids and of the acrosome of mature spermatozoa. (plos.org)
  • Ca 2+ induces spinning-like swimming, different from swimming of sperm from other species. (elifesciences.org)
  • Sperm intracellular cAMP levels depend on the activity of adenylyl cyclases, mostly SACY, though transmembrane-containing adenylyl cyclases are also present, and on the activity of cyclic nucleotide phosphodiesterases (PDE) whose role is to degrade cAMP into 5'-AMP. (plos.org)
  • It is located in the sperm head rather than the flagellum and is controlled by intracellular pH, but not cyclic nucleotides. (elifesciences.org)
  • This process involves the production of several successive sperm cell precursors, starting with spermatogonia, which differentiate into spermatocytes. (wikipedia.org)
  • A study published December 3 in Cell Metabolism reveals that a man's weight affects the heritable information contained in sperm. (sciencedaily.com)
  • An average of 5,000 structural changes to sperm cell DNA were observed from the time before the surgery, directly after, and one year later. (sciencedaily.com)
  • There was not an obvious shedding process of unnecessary cytoplasm during spermiogenesis although, the cell size of the maturing spermatozoon was reduced. (frontiersin.org)
  • In zebrafish sperm, a more alkaline pH inside the cell causes calcium ions to flow in and this influx of calcium ions triggers a unique spinning-like swimming movement that is different from the swimming of other sperm from other species. (elifesciences.org)
  • Given the low recovery of spermatozoa after applying a selection gradient, further studies will be needed to increase the recovery rate without damaging of the cell quality. (diva-portal.org)
  • The acrosome contains enzymes that break down the outer membrane of an egg cell, allowing the sperm to fertilize the egg. (medlineplus.gov)
  • These spermatozoa also experienced increased mitochondrial generation of reactive oxygen species after 1 week of exposure, with elevated DNA oxidation and fragmentation across all exposure periods. (nature.com)
  • Large numbers of sperm are typically needed in this process and some species have sperm that exhibit collective or aggregate motion when swimming in groups. (mdpi.com)
  • The evaluation of cryopreserved fish sperm is important for optimising freeze-thawing procedures for commercially important fish species. (scialert.net)
  • 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)
  • In addition, extracellular cAMP-induced sperm hyperactivation and concomitantly increased the proportion of spermatozoa withhigh mitochondrial activity (P (conicet.gov.ar)
  • Our laboratory has successfully vitrified spermatozoa without the use of permeable cryoprotectants, but subcellular-level evidence was missing. (uni-koeln.de)
  • however, there were no differences in sperm concentrations. (bvsalud.org)
  • PICSI procedure:the oocytes will be placed into a PICSI petri dish (whose bottom is coated with hyaluronic acid) and the mature spermatozoa that are attached to the bottom of the dish will be injected into them. (who.int)