Conspicuous swellings of the perineal skin can be observed in females of many catharrine
primate species particularly during the middle stages of the ovarian cycle. The functional …

Females of many catharrine primates show a periodic and often pronounced swelling of the
perineum, the functional significance of which is unclear. Several hypotheses that exist to …

While many theories exist on the evolution of the sexual swelling signal in female primates,
the significance of the very large and variable swellings found in some catarrhine primates is …

Female chimpanzees mate promiscuously during a period of extended receptivity marked by
prominent sexual swelling. Recent studies of wild chimpanzees indicate that subtle …

Although female catharrine primates show cyclic changes in sexual behavior and sexual
swellings, the value of these sexual signals in providing information to males about timing of …

The role of sexual displays in mating strategies and their reliability in indicating the time of
ovulation has given rise to multiple explanations in nonhuman primates. In order to …

The extent to which catharrine primate males are able to discern the fertile phase during the
female ovarian cycle under natural conditions is still debated. In a recent study, we showed …

In macaques and other cercopithecoid primates, large anogenital swellings (AS) are
generally found only in those species in which reproduction is not seasonally restricted. In …

Fecal and urine samples were collected from 81 female East African chimpanzees (Pan
troglodytes schweinfurthii) in three major study populations in Gombe National Park …

Primate sexual swellings are hormone-dependent sexual signals that play a key role in
determining patterns of behavior. They are among the most conspicuous signals exhibited …