A Right to Choose?: Sex Selection in the International Context [PDF]
, 2007 While there is some debate among doctors, ethicists, and the general public about the level of medical necessity that should justify a sex-selection procedure, most accept that sex selection for medical reasons is beyond ethical reproach, and in some ...
Bumgarner, Ashley
core +2 more sources
Sperm storage by males causes changes in sperm phenotype and influences the reproductive fitness of males and their sons [PDF]
, 2017 Recent studies suggest that environmentally induced effects on sperm phenotype can influence offspring phenotype beyond the classic Mendelian inheritance mechanism.
Adriaenssens +54 more
core +1 more source
The male to female ratio at birth [PDF]
, 2014 The factors that influence the male to female ratio at birth are legion. Males are usually born in excess and stress decreases the ratio while wellbeing and good health tends to increase it.
Grech, Victor E., Mamo, Julian
core +1 more source
مجله دانشکده پزشکی اصفهان, 2009 Background: Sperm selection for ICSI is based on morphology and motility, but these parameters may not relevant chromatin integrity. One of the sperm selection methods for ICSI is based on sperm functional characteristics.
Mohammad Reza Deemeh +5 more
doaj
Proteins involved in motility and sperm-egg interaction evolve more rapidly in mouse spermatozoa.
PLoS ONE, 2014 Proteomic studies of spermatozoa have identified a large catalog of integral sperm proteins. Rapid evolution of these proteins may underlie adaptive changes of sperm traits involved in different events leading to fertilization, although the selective ...
Alberto Vicens +2 more
doaj +1 more source
Evolution of sperm morphology in anurans : Insights into the roles of mating system and spawning location [PDF]
, 2014 Background: The degree of postcopulatory sexual selection, comprising variable degrees of sperm competition and cryptic female choice, is an important evolutionary force to influence sperm form and function.
Jehle, R, Liao, WB, Lou, SL, Zeng, Y
core +2 more sources
Testes size, testosterone production and reproductive behaviour in a natural mammalian mating system [PDF]
, 2012 1. Testosterone (T) is a key mediator in the expression of numerous morphological and behavioural traits in mammals, but the factors underlying individual variation in circulating T levels are poorly understood. 2.
Lincoln, Gerald A. +5 more
core
Variation in the post-mating fitness landscape in fruitflies [PDF]
, 2017 Sperm competition is pervasive and fundamental to determining a male’s overall fitness. Sperm traits and seminal fluid proteins (Sfps) are key factors. However, studies of sperm competition may often exclude females that fail to remate during a defined ...
Allen +52 more
core +1 more source
Expression of a catalytically inactive mutant form of glutathione peroxidase 4 (Gpx4) confers a dominant-negative effect in male fertility. [PDF]
, 2015 The selenoenzyme Gpx4 is essential for early embryogenesis and cell viability for its unique function to prevent phospholipid oxidation. Recently, the cytosolic form of Gpx4 was identified as an upstream regulator of a novel form of non-apoptotic cell ...
Aichler, M +12 more
core +1 more source
BMC Evolutionary Biology, 2008 Background Sperm morphology can be highly variable among species, but less is known about patterns of population differentiation within species. Most studies of sperm morphometric variation are done in species with internal fertilization, where sexual ...
Manier Mollie K, Palumbi Stephen R
doaj +1 more source