Results 1 to 10 of about 109,348 (344)

Selection on Sperm Count, but Not on Sperm Morphology or Velocity, in a Wild Population of Anolis Lizards [PDF]

open access: yesCells, 2021
Sperm competition is a widespread phenomenon that shapes male reproductive success. Ejaculates present many potential targets for postcopulatory selection (e.g., sperm morphology, count, and velocity), which are often highly correlated and potentially ...
Ariel F. Kahrl   +6 more
doaj   +2 more sources

Effects of Normal Morphology Sperm Count on Fertilization Time in Infertile Couples with Teratospermic Males: An Evaluation with an Embryoscope

open access: diamondJournal of Urological Surgery, 2022
Objective:Incubation of the embryo is the vital step in assisted reproductive techniques. Embryoscope systems are incubators that keep the embryo stable and allow for continuous observation without opening the lid.
Elif Ganime Aygun, Emine Karabük
doaj   +2 more sources

Decrease in Sperm Count After Bariatric Surgery: Case Reports. [PDF]

open access: diamondCureus, 2021
Razzaq A   +4 more
europepmc   +2 more sources

Radioprotective and Radiomitigative Effects of Resveratrol in Radiation-Induced Reproductive Toxicity in Male Mice [PDF]

open access: yesToxics
Background: Agents with free radical-scavenging functions may act as radiation modifiers, protectors, or mitigators. Methods: We investigated whether supplementation with resveratrol (RSV) in mice, at different times after the beginning of X-irradiation,
Małgorzata M. Dobrzyńska   +1 more
doaj   +2 more sources

Influence of ejaculatory abstinence period on semen quality of 5165 normozoospermic and oligozoospermic Nigerian men: A retrospective study

open access: yesHealth Science Reports, 2022
Background and Aims Several studies have shown that the length of ejaculatory abstinence alters sperm quality. However, the available data are conflicting and none seems to exist in a Nigerian population.
Roland E. Akhigbe   +3 more
doaj   +1 more source

Temporal trends in sperm count: a systematic review and meta-regression analysis [PDF]

open access: yesHuman Reproduction Update, 2017
Hagai Levine   +2 more
exaly   +2 more sources

Abnormal Human Sperm Parameters Contribute to Sperm DNA Fragmentation in Men with Varicocele [PDF]

open access: yesThe World Journal of Men's Health, 2018
Purpose: This study was performed to evaluate and compare threshold sperm parameters and sperm DNA fragmentation index (DFI), and further analyzed whether sperm DFI could be predicted from sperm parameters in men with varicocele.
Yong-Seog Park   +5 more
doaj   +1 more source

Evidence for decreasing sperm count in African population from 1965 to 2015. [PDF]

open access: diamondAfr Health Sci, 2017
Sengupta P   +4 more
europepmc   +3 more sources

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