Genital coevolution between the sexes is expected to be common because of the direct
interaction between male and female genitalia during copulation. Here we review the …

Social experiences are strongly associated with individuals' health, aging, and survival in
many mammalian taxa, including humans. Despite their role as models of many other …

Background Social behavior and social organization have major influences on individual
health and fitness. Yet, biomedical research focuses on studying a few genotypes under …

Background Ejaculates contain a diverse mixture of sperm and seminal fluid proteins, the
combination of which is crucial to male reproductive success under competitive conditions …

Mate choice is a potent generator of diversity and a fundamental pillar for sexual selection
and evolution. Mate choice is a multistage affair, where complex sensory information and …

The amniote phallus and limbs differ dramatically in their morphologies but share patterns of
signaling and gene expression in early development. Thus far, the extent to which genital …

The rapid evolution of male genitalia is a nearly ubiquitous pattern across sexually
reproducing organisms, likely driven by the evolutionary pressures of male–male …

The extreme morphological variability of the baculum across mammals is thought to be the
result of sexual selection (particularly, high levels of postcopulatory selection). However, the …

In many animals, male ejaculates coagulate to form what has been termed a copulatory
plug, a structure that varies in size and shape but often fills and seals the female's …

Male genitalia exhibit a taxonomically widespread pattern of rapid and divergent evolution.
Sexual selection is generally believed to be responsible for these patterns of evolutionary …