Results 11 to 20 of about 651,503 (286)

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

open access: yesJournal 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

Development of a Noble On-Site Dual Screening System for Male Fertility of Sperm Count and Hyaluronidase Activity [PDF]

open access: yesThe World Journal of Men's Health
Purpose: To develop a noble on-site dual screening system for sperm concentration and hyaluronidase (HAdase) activity of male fertility based on lateral-flow assay methods, and to evaluate the effectiveness of this dual screening system.
Jisuk Lee   +3 more
doaj   +2 more sources

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

Psychological and physiological adaptations to sperm competition in humans [PDF]

open access: yes, 2005
Postcopulatory competition between males, in the form of sperm competition, is a widespread phenomenon in many animal species. The extent to which sperm competition has been an important selective pressure during human evolution remains controversial ...
Pound, N, Goetz, AT, Shackelford, TK
core   +6 more sources

The association between sperm aneuploidy and male infertility: Screening, aetiology and possible routes to alternative therapy [PDF]

open access: yes, 2003
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.One in six couples wishing to start a family are infertile.
Tempest, Helen Ghislaine
core   +7 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

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

Effect of Aerobic Bacterial Infection to The Semen Parameters [PDF]

open access: yesمجلة التربية والعلم, 2007
Semen analysis and culture assay were done ( 1 00) patients suspected tobe subfertile men attended the male infertility clinic at Al-Khansa'ahospital in Mosul.
Asma'a Al-Taee, Abbas Al-Dajaily
doaj   +1 more source

Effects of exogenous oxytocin on the semen characteristics of the Indonesian wild cattle, banteng (Bos javanicus), collected by electroejaculation: Implications for semen collection techniques and genome resource banking

open access: yesTheriogenology Wild, 2023
Developing protocols that maximize the total sperm output during a semen collection from an endangered species is essential for strategic genome resource banking practices. Exogenous oxytocin has been administered to domestic bovid species prior to semen
James D. Gillis   +7 more
doaj   +1 more source

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