Results 31 to 40 of about 492,766 (213)
Scientific Reports, 2023 Because the total gene copy number remains constant and all genes are normally expressed, carriers of balanced chromosomal translocations usually have a normal phenotype but are able to produce many different types of gametes during meiosis, and ...
Xiaoqi Zeng +6 more
doaj +1 more source
DNA fragmentation index (DFI) as a measure of sperm quality and fertility in mice. [PDF]
, 2020 Although thousands of genetically modified mouse strains have been cryopreserved by sperm freezing, the likelihood of cryorecovery success cannot be accurately predicted using conventional sperm parameters.
Li, Ming-Wen, Lloyd, KC Kent
core +1 more source
Cold Spring Harbor Perspectives in Biology, 2017 Fertilization is exceptionally complex and, depending on the species, happens in entirely different environments. External fertilizers in aquatic habitats, like marine invertebrates or fish, release their gametes into the seawater or freshwater, whereas sperm from most internal fertilizers like mammals cross the female genital tract to make their way ...
Wachten, D., Jikeli, J., Kaupp, U.
openaire +3 more sources
Evolution of sperm size in nematodes: sperm competition favours larger sperm [PDF]
Proceedings of the Royal Society of London. Series B: Biological Sciences, 1999 In the free-living rhabditid nematode Caenorhabditis elegans, sperm size is a determinant of sperm competitiveness. Larger sperm crawl faster and physically displace smaller sperm to take fertilization priority, but not without a cost: larger sperm are produced at a slower rate. Here, we investigate the evolution of sperm size in the family Rhabditidae
C W, LaMunyon, S, Ward
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Frontiers in Public Health, 2023 BackgroundAir pollution may impair male fertility, but it remains controversial whether air pollution affects semen quality until now.ObjectivesWe undertake a meta-analysis to explore potential impacts of six pollutants exposure during the entire window (
Junjie Liu +5 more
doaj +1 more source
Basic and Clinical Andrology, 2021 Résumé Contexte Lacryoconservation des spermatozoïdes, méthode efficace pour préserver lafertilité masculine, est très avantageuse pour les hommes atteints de cancer.Malheureusement, comme les médecins et les patients atteints de cancersignorent les ...
Xiao Liu +11 more
doaj +1 more source
Frontiers in Endocrinology, 2022 ObjectiveReproductive hormones are a traditional good method to evaluate spermatogenesis but might not accurately represent local spermatogenesis. To find a more accurate method, seminal reproductive hormones were studied.MethodsA bidirectional cohort ...
Huang Liu +10 more
doaj +1 more source
Sperm Depletion and Mating Behavior in the Parasitoid Wasp \u3ci\u3eSpalangia Cameroni\u3c/i\u3e (Hymenoptera: Pteromalidae) [PDF]
, 2018 Mating behavior was examined in the parasitoid wasp Spalangia cameroni. Males attempted copulation with both virgins and already mated females. Males attempted copulation regardless of whether they still had sperm. Already mated females rejected attempts
King, Bethia H
core +2 more sources
Re-sperm collection with a short abstinence time: a strategy for successful cryopreservation in cryptozoospermia [PDF]
Journal of Men's HealthBackground: Recent studies suggest that short-term abstinence may improve semen parameters; however, its impact on cryptozoospermia remains underexplored.
Wen-Rui Zhao +7 more
doaj +1 more source
Frontiers in Pharmacology, 2022 Objective: The aim of the study was to explore the evidence of JWRJD in the treatment of cryptozoospermia.Methods: A total of 162 cryptozoospermia patients with varicocele who refused to undergo surgery were included from January 2021 to December 2021 ...
Huang Liu +13 more
doaj +1 more source