They have a similar social organization model consisting of multi-male/multi-female groups, with philopatric males and immigrant females; the latter typically leave their natal group to transfer into another group before the first parturition (Boesch and Boesch-Ackermann, 2000; Gerloff et al., ...
In Old World monkeys, females demonstrate more interest in infants, engage in more play parenting throughout their juvenile years, and spend more time handling infants than males (Geary, 1998; Maestripieri, 1994; Pryce, 1995). Show abstract Sexual differentiation of the human brain: Relation to...
Furthermore, reproductive females may have higher ectoparasite burdens than non-reproductive females. It is possible that testosterone-stimulated behaviors in males and offspring investment by females incur energetic costs that inhibit immune function. If questing ticks can sense host sex or reproductive ...
The males are feminized and the females are masculinized. The hormones are at least somewhat persistent in the environment. Besides that, the fact remains that “A 2009 study found that children who consumed the most protein from animal sources entered puberty about seven months earlier than ...
hedge fundsalphatestosteronefacial width-to-heightmasculinedisposition effectoperational riskUsing facial width-to-height ratio (fWHR) as a proxy for testosterone, we show that high-testosterone hedge fund managers significantly underperform low-testost...
a dog's male hormones, which are known as testosterone. The goal of the surgery is to make the dog sterile and therefore unable to impregnate any female dogs. With the testicles out of the picture, male dogs' bodies have reduced amounts of testosterone — their predominant sex drive ...
perhaps as early as the surge in testosterone during male sexual differentiation in the uterus. Longevity may also relate to immune system differences, responses to oxidative stress, mitochondrial fitness or even the fact that men have one X chromosome (and one Y), while women have two X chromo...
That can mean increased body hair, enlargement of the clitoris, and permanent voice deepening in females. At the same time, excess testosterone-like steroids can cause feminization in males, because the body converts the exce...
However, more importantly, even after adjusting for height and weight, women still have lower cartilage volumes than men. In older populations, the maximal and mean cartilage thickness in patella and tibial sites are still higher in males compared to females,12, 46, 47 as well as the ...
which are commonly thought of as traditionally male and female sex hormones. The difference between the genders is the relative concentrations of these hormones with males generally having higher concentrations of androgen hormones like testosterone, while females have higher concentrations of estrogen hormo...