May 2022 in “Hormones and behavior” Prairie dogs with fewer neighbors are more stressed but their number of babies isn't affected.
78 citations,
November 2014 in “Functional Ecology” Heavily hunted wolves have higher stress and reproductive hormone levels.
September 2016 in “Princeton University Press eBooks” The document concludes that understanding health requires considering evolutionary perspectives on reproductive fitness, and recognizing the complexity of factors like diet, testosterone, and sexual orientation.
Toxoplasma gondii infection may increase testosterone levels in males.
45 citations,
November 2021 in “Fertility and Sterility” The conclusion is that women under 35 should start fertility checks after 12 months of trying to conceive, women over 35 after 6 months, and women over 40 should start immediately. The checks should include ovulation status, reproductive tract structure, and male partner's semen evaluation.