Results 51 to 60 of about 316,099 (294)
Sexual selection in a transparent worm : insights from fluorescent sperm [PDF]
, 2015 Sexual selection is a potent source of selection underlying the evolution of sexual dimorphism, reproductive strategies and mating systems. Although sexual selection was initially thought to occur exclusively at the pre-copulatory stage (e.g., contests ...
Marie-Orleach, Lucas
core +1 more source
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 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
Reproductive Biology and EndocrinologyFor patients with severe oligozoospermia, cryopreservation of single human spermatozoa highlights its advantages. Previous research has focused on the development of micro-drop single sperm freezing methods with non-biological carriers over the past 20 ...
Shasha Liu +5 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
Sperm competition and sperm length in shorebirds [PDF]
, 1999 We investigated how sperm morphology varies across 16 species of shorebirds in the Scolopacidae, Charadriidae, and Jacanidae. Sperm were significantly longer in nonmonogamous than in socially monogamous species.
Briskie, J V, Johnson, D D P
core
Genetic variance and genotype reaction norms in response to larval food manipulation for a trait important in scorpionfly sperm competition. [PDF]
, 2008 Engqvist L. Genetic variance and genotype reaction norms in response to larval food manipulation for a trait important in scorpionfly sperm competition. Functional Ecology. 2008;22(1):070915213639001-???Sperm competition is an important attribute of many
L. Engqvist +1 more
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FEBS Open Bio, EarlyView.We describe detailed protocols for the purification and preparation of Marchantia polymorpha Auxin Response Factor 2 (MpARF2). This protein is fused to an MBP solubility tag and an mNG fluorescent tag and is purified from Escherichia coli. The presented procedures make it possible to study MpARF2 assemblies, which could arise from phase separation ...
Bas Janssen +5 more
wiley +1 more source
Reproductive Biology and EndocrinologyBackground To evaluate whether there was a difference in outcome between pulsatile gonadotropin releasing hormone (GnRH) therapy and human chorionic gonadotropin/human menopausal gonadotropin (hCG/HMG) therapy for induction of spermatogenesis in post ...
Yi Zheng +6 more
doaj +1 more source
Semen parameters are seriously affected in acephalic spermatozoa syndrome
Basic and Clinical Andrology, 2022 Résumé Contexte Des études antérieures ont rapporté que certains patients qui avaient des spermatozoïdes sans tête présentaient une mauvaise qualité du sperme, mais il n’y a eu aucune analyse systématique publiée sur la qualité du sperme chez les ...
Li-juan Ying +7 more
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