Acrosome: The acrosome is an organelle that develops over the anterior half of the head in the spermatozoa (sperm cells) of many animals. It is a cap-like structure derived from the Golgi apparatus.Spermiogenesis: Spermiogenesis is the final stage of spermatogenesis, which sees the maturation of spermatids into mature, motile spermatozoa. The spermatid is more or less circular cell containing a nucleus, Golgi apparatus, centriole and mitochondria.Gastrocopta pellucida: Gastrocopta pellucida is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae, the vertigo snails.Postcoital test: The postcoital test (PCT) (also known as Sims test, Huhner test or Sims-Huhner test) is a test in the evaluation of infertility. The test examines interaction between sperm and mucus of the cervix.Hyperactivation: Hyperactivation is a type of sperm motility. Hyperactivated sperm motility is characterised by a high amplitude, asymmetrical beating pattern of the sperm tail (flagellum).Acrosin: Acrosin is a digestive enzyme that acts as a protease. In humans, acrosin is encoded by the ACR gene.Hook protein: HOOK is a family of evolutionarily related proteins.Vitelline membrane outer layer protein I (VMO-I): In molecular biology, this entry refers to a protein domain called, the Vitelline membrane outer layer protein I (VMO-I). It is a structure found on the outside of an egg, in the vitelline membrane.Sarah R, Lotfi: Sarah R. Lotfi (b.Sea urchin injury: Sea urchin injuries are caused by contact with sea urchins, and are characterized by puncture wounds inflicted by the animal's brittle, fragile spines.Epididymis: The epididymis (; plural: epididymides or ) is a tube that connects a testicle to a vas deferens in the male reproductive system. It is present in all male reptiles, birds, and mammals.ChlortetracyclineNatural cycle in vitro fertilization: Natural Cycle IVF is in vitro fertilisation (IVF) using either of the following procedures:Spermatid: The spermatid is the haploid male gametid that results from division of secondary spermatocytes. As a result of meiosis, each spermatid contains only half of the genetic material present in the original primary spermatocyte.ExocytosisCalcium signaling: Calcium ions are important for cellular signalling, as once they enter the cytosol of the cytoplasm they exert allosteric regulatory effects on many enzymes and proteins. Calcium can act in signal transduction resulting from activation of ion channels or as a second messenger caused by indirect signal transduction pathways such as G protein-coupled receptors.Trimidox: Trimidox is an antibacterial agent that is used in cattle and swine to prevent and treat infections by both Gram-negative and Gram-positive bacteria. The active ingredients in Trimidox are W/V trimethoprim (4%) and W/V sulfadoxine (20%), the rest of the solution is an organic solvent (40 mg of trimethoprim and 200 mg of sulfadoxine in each ml of solution).Semen quality: Semen quality is a measure of the ability of semen to accomplish fertilization. Thus, it is a measure of fertility in a man.Male infertilityCAP protein family: In molecular biology, the CAP protein family (cysteine-rich secretory proteins, antigen 5, and pathogenesis-related 1 proteins (CAP)) is a large family of proteins that are found in a wide range of organisms, including prokaryotes and non-vertebrate eukaryotes. The nine subfamilies of the mammalian CAP 'super'family include: the human glioma pathogenesis-related 1 (GLIPR1), Golgi associated pathogenesis related-1 (GAPR1) proteins, peptidase inhibitor 15 (PI15), peptidase inhibitor 16 (PI16), cysteine-rich secretory proteins (CRISPs), CRISP LCCL domain containing 1 (CRISPLD1), CRISP LCCL domain containing 2 (CRISPLD2), mannose receptor like and the R3H domain containing like proteins.Blood–testis barrier: The blood–testis barrier is a physical barrier between the blood vessels and the seminiferous tubules of the animal testes. The name "blood-testis barrier" is misleading in that it is not a blood-organ barrier in a strict sense, but is formed between Sertoli cells of the seminiferous tubule and as such isolates the further developed stages of germ cells from the blood.SophoricosideBufotoxin: Bufotoxins are a family of toxic steroid lactones found in the parotoid glands, skin and venom of many toads (genus Bufo); other amphibians; and some plants and mushrooms. The exact composition varies greatly with the specific source of the toxin.Low-voltage electron microscope: Low-voltage electron microscope (LVEM) is an electron microscope which operates at accelerating voltages of a few kiloelectronvolts or less. While the low voltage electron microscopy technique will never replace conventional high voltage electron microscopes, it is quickly becoming appreciated for many different disciplines.Lysophosphatidylcholine: Lysophosphatidylcholines (LPC, lysoPC), also called lysolecithins, are a class of chemical compounds which are derived from phosphatidylcholines. They result from partial hydrolysis of phosphatidylcholines, which removes one of the fatty acid groups.Cell membraneGolden Globe Award for Best Original Score: The Golden Globe Award for Best Original Score is one of several categories presented by the Hollywood Foreign Press Association (HFPA), an organization of journalists who cover the United States film industry, but are affiliated with publications outside North America, since its institution in 1947. Since the 5th Golden Globe Awards (1947), the award is presented annually, except from 1953 to 1958.Wet sulfuric acid process: The wet sulfuric acid process (WSA process) is one of the key gas desulfurization processes on the market today. Since the Danish catalyst company Haldor Topsoe introduced and patented this technology in the late 1980s, it has been recognised as an efficient process for recovering sulfur from various process gasses in the form of commercial quality sulfuric acid (H2SO4), with simultaneous production of high pressure steam.A. N. Hartley: Annie Norah Hartley (1902 – 1994), usually known simply as Norah Hartley, was a dog breeder and the first female board member of the Kennel Club.Pisaster ochraceusCervical mucus plug: A cervical mucus plug (operculum) is a plug that fills and seals the cervical canal during pregnancy. It is formed by a small amount of cervical mucus.Baby hamster kidney cell: Baby Hamster Kidney fibroblasts (aka BHK cells) are an adherent cell line used in molecular biology.Low Fertility Cohorts Study: The Low Fertility Cohorts Study, 1978: A Survey of White, Ever-Married Women Belonging to the 1901-1910 United States Birth Cohorts,Data Sharing For Demographic Research consists of personal interviews of white, ever-married women born between July 1, 1900, and June 30, 1910. In 1978, a national survey of 1,049 married women between the ages of 68 and 78 were interviewed between the months of March and July in order to investigate low fertility during the 1920s and 1930s and the women of childbearing age during those decades.Ovarian tissue cryopreservation: Ovarian tissue cryopreservation is cryopreservation of tissue of the ovary of a female.Fallopian tube obstructionZygodontomys brevicauda: Zygodontomys brevicauda, also known as the short-tailed zygodont,Musser and Carleton, 2005 short-tailed cane mouse,Delgado et al., 2008 or common cane mouse,Duff and Lawson, 2004 is a species of rodent in the genus Zygodontomys of tribe Oryzomyini.Sperm: Sperm is the male reproductive cell and is derived from the Greek word (σπέρμα) sperma (meaning "seed"). In the types of sexual reproduction known as anisogamy and its subtype oogamy, there is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell.List of scientists whose names are used in chemical element names: Fourteen of the chemical elements are named after scientists. Below is the list of those scientists whose names are used in element nomenclature.Rhabdomys: Rhabdomys is a largely Southern African genus of muroid rodents slightly larger than house mice. They are known variously as Striped or Four-Striped mice or rats.Retrograde ejaculationFucoseOocyte selection: Oocyte selection is a procedure that is performed prior to in vitro fertilization, in order to use oocytes with maximal chances of resulting in pregnancy. In contrast, embryo selection takes place after fertilization.Beef cattle: Beef cattle are cattle raised for meat production (as distinguished from dairy cattle, used for milk production). The meat of adult cattle is known as beef.Immunostaining: Immunostaining is a general term in biochemistry that applies to any use of an antibody-based method to detect a specific protein in a sample. The term immunostaining was originally used to refer to the immunohistochemical staining of tissue sections, as first described by Albert Coons in 1941.Subtherapeutic antibiotic use in swine: Antibiotics are commonly used in commercial swine production in the United States and around the world. They are used for disease treatment, disease prevention and control, and growth promotion.PentoxifyllineJacalin: Jacalin is a plant based lectin, but not a legume lectin, found in jackfruit. It has been studied for capturing O-glycoproteins such as mucins and IgA1, for potential applications in human immunology.Lipid bilayer fusion: In membrane biology, fusion is the process by which two initially distinct lipid bilayers merge their hydrophobic cores, resulting in one interconnected structure. If this fusion proceeds completely through both leaflets of both bilayers, an aqueous bridge is formed and the internal contents of the two structures can mix.Alkaliphile: Alkaliphiles are a class of extremophilic microbes capable of survival in alkaline (pH roughly 8.5-11) environments, growing optimally around a pH of 10.Fluorescent tag: In molecular biology and biotechnology, a fluorescent tag, also known as a label or probe, is a molecule that is attached chemically to aid in the labeling and detection of a biomolecule such as a protein, antibody, or amino acid. Generally, fluorescent tagging, or labeling, uses a reactive derivative of a fluorescent molecule known as a fluorophore.Voltage-dependent calcium channel: Voltage-dependent calcium channels (VDCC) are a group of voltage-gated ion channels found in the membrane of excitable cells (e.g.Hyaluronidase: The hyaluronidases () are a family of enzymes that degrade hyaluronic acid. Karl Meyer classified these enzymes in 1971 into three distinct groups, a scheme based on the enzyme reaction products.BicarbonateEagle's minimal essential medium: Eagle's minimal essential medium (EMEM) is a cell culture medium developed by Harry Eagle that can be used to maintain cells in tissue culture.Total internal reflection fluorescence microscope: A total internal reflection fluorescence microscope (TIRFM) is a type of microscope with which a thin region of a specimen, usually less than 200 nm can be observed.Hydraulic fracturing proppants: A proppant is a solid material, typically sand, treated sand or man-made ceramic materials, designed to keep an induced hydraulic fracture open, during or following a fracturing treatment. It is added to a frac'ing fluid which may vary in composition depending on the type of fracturing used, and can be gel, foam or slickwater–based.Tumor-associated glycoprotein: Tumor-associated glycoproteins (TAGs) are glycoproteins found on the surface of many cancer cells. They are mucin-like molecules with a molar mass of over 1000 kDa.Vital stain: A vital stain in a casual usage may mean a stain that can be applied on living cells without killing them. Vital stains have been useful for diagnostic and surgical techniques in a variety of medical specialties.Fetal bovine serum: Fetal bovine serum (FBS) or fetal calf serum is the blood fraction remaining after the natural coagulation of blood, followed by centrifugation to remove any remaining red blood cells. Fetal bovine serum comes from the blood drawn from a bovine fetus via a closed system of collection at the slaughterhouse.