Results 111 to 120 of about 2,405,716 (326)
Urology Research and Practice, 2019 Objective: A male factor is responsible in approximately 30-40% of couples receiving infertility treatment. Routinely, such couples undergo semen analysis including parameters such as sperm count, motility and morphology. Generally, the analysis of sperm
Oya Sena Aydos +4 more
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Cryptic male choice: sperm allocation strategies when female quality varies [PDF]
, 2002 Reinhold K, Kurtz J, Engqvist L. Cryptic male choice: sperm allocation strategies when female quality varies. Journal of Evolutionary Biology. 2002;15(2):201-209.We examined evolutionary stable sperm allocation and included stochastic variation in male ...
Reinhold, Klaus +5 more
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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
Rheotaxis facilitates upstream navigation of mammalian sperm cells [PDF]
, 2014 A major puzzle in biology is how mammalian sperm maintain the correct swimming direction during various phases of the sexual reproduction process. Whilst chemotaxis may dominate near the ovum, it is unclear which cues guide spermatozoa on their long ...
Dunkel, Jörn +8 more
core +1 more source
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
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
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Journal of Basic and Applied Zoology, 2019 Background The potential toxicity of clove, Syzygium aromaticum, notwithstanding its beneficial health effect to human health remains a critical issue. Purpose This study was designed to assess the effects of oil extracts of clove (S.
Damola V. Akinwande +4 more
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
Embodied attachments: IVF, the maternal body, and the making of embryo kinship
Feminist Anthropology, EarlyView.Abstract Within the sphere of IVF (in vitro fertilization), there is increasing concern about the stockpiles of frozen embryos held in clinics across the country. This normative discourse tends to take the patient‐embryo relationship for granted, with salient political consequences for current embryo ‘personhood’ debates.
Manon Lefevre
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
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