Results 211 to 220 of about 93,914 (256)
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The requirements for sexual reproduction
Human Genetics, 1981Sexual reproduction requires controls for gonadogenesis, genital differentiation, and sexuality. The initiating event is induction of testicular differentiation by an effect of the H-Y locus or a combination of X- and Y-borne genes. This paper reviews the evidence that testosterone, either directly or via regulated conversion to other steroids ...
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Sexual selection and the maintenance of sexual reproduction
Nature, 2001The maintenance of sexual reproduction is a problem in evolutionary theory because, all else being equal, asexual populations have a twofold fitness advantage over their sexual counterparts and should rapidly outnumber a sexual population because every individual has the potential to reproduce.
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Sexual and Reproductive Health
Seminars in Reproductive Medicine, 2022Danielle, Mazza, Jessica R, Botfield
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Endorphins, Sexuality, and Reproduction
Beta-endorphin is secreted from the hypothalamus and pituitary in both mother and newborn. The placenta produces numerous pituitary hormones from the third month of pregnancy, one of which is βE. It has been suggested that βE has a role in the appetitive and precopulatory phase of sexual behavior in animals.openaire +2 more sources
Sexual and Reproductive Violence
Journal of Obstetrics and Gynaecology Research, 2023openaire +2 more sources
Sexual and Reproductive Health
Journal of Obstetrics and Gynaecology Research, 2023openaire +2 more sources
Female erectile tissues and sexual dysfunction after pelvic radiotherapy: A scoping review
Ca-A Cancer Journal for Clinicians, 2022Julie Bloom +2 more
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