Results 101 to 110 of about 651,503 (286)
Evidence for adaptive explanations of semelparity in animals
Biological Reviews, EarlyView.ABSTRACT Semelparity, the reproductive strategy of reproducing once, is widespread but uncommon in animals. Classes of models to explain the evolution of semelparity are based either on age structure and mortality schedules – demographic models in which high post‐reproductive mortality risk favours high reproductive effort and semelparity results from ...
Diana O. Fisher +1 more
wiley +1 more source
Studies on the sperm reservoir of the pig oviduct [PDF]
, 2003 During sperm transport in the female pig a proportion of spermatozoa are arrested, often for 24 h or more, in a particular segment of the utero-tubal junction (UTJ) and the adjacent tubal isthmus, where a sperm reservoir (SR) is built up.
Tienthai, Paisan
core +1 more source
Effect of age on semen parameters in infertile men after varicocelectomy
Therapeutics and Clinical Risk Management, 2011 Kamaleddin Hassanzadeh-Nokashty1, Parisa Yavarikia2, Alireza Ghaffari3, Samad Hazhir1, Mohammadali Hassanzadeh11Department of Urology, 2Faculty of Nursery and Midwifery, 3Department of Internal Medicine, Tabriz University of Medical Sciences, Tabriz ...
Hassanzadeh-Nokashty K +4 more
doaj
Biological Reviews, EarlyView.ABSTRACT Heat stress (HS) is an increasing threat to male reproductive health, disrupting spermatogenesis through complex and interdependent cellular responses within the seminiferous epithelium. Although excessive reactive oxygen species (ROS) production is a hallmark of HS, ROS also act as central regulators of cell fate decisions beyond their role ...
Ribrio Ivan Tavares Pereira Batista
wiley +1 more source
TOTAL MOTİL SPERM SAYISININ İNTRAUTERİN İNSEMİNASYON BAŞARISINA ETKİSİ
Cerrahpaşa Medical Journal, 2014 Background and Design.- In our clinic, 162 couples underwent 421 cycles of intrauterine insemination (IUI) with male factor infertility but normal female findings.
Bülent ALICI +4 more
doaj
Middle East Fertility Society Journal, 2015 Objective: To investigate the impact of alcohol on the reproductive hormones, oxidative stress and semen parameters. Design: This is an experimental animal study.
A.A. Oremosu, E.N. Akang
doaj +1 more source
Equine Veterinary Journal, EarlyView.Abstract Background Persistent breeding‐induced endometritis (PBIE) is a common reason for mares failing to establish pregnancy. Objective To examine the hypothesis that advancing mare age and embryo donor status predispose to PBIE and compromise fertility.
Tom Stout +3 more
wiley +1 more source
Food Safety and Health, EarlyView.Fenugreek and stevia extracts protect against dexamethasone‐induced testicular damage in male rats by enhancing antioxidant defenses, improving sperm quality, and restoring hormonal balance, highlighting their potential as natural therapeutics for preventing corticosteroid‐induced reproductive toxicity.
Mosab Gad +3 more
wiley +1 more source
ToxicsBackground: 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 +1 more source
Geographical Pattern of Testicular Cancer Points to Maternal Exposures Behind Increasing Incidence
International Journal of Cancer, EarlyView.ABSTRACT Evidence suggests that testicular cancer (TC) originates from germ cell neoplasia in situ arising during fetal development, implying that prenatal environmental exposures may influence disease risk. We investigated whether maternal place of residence during pregnancy is associated with regional variation in TC incidence.
Antti Kaipia +8 more
wiley +1 more source