Concealed ovulation or hidden estrus in a species is the lack of any perceptible change in an adult female (for instance, a change in appearance or scent) when she is fertile and near ovulation. Some examples of perceptible changes are swelling and redness of the vulva in baboons and bonobos, and pheromone release in the feline family. In contrast, the females of humans and a few other species[1] that undergo hidden estrus have few external signs of fecundity, making it difficult for a mate to consciously deduce, by means of external signs only, whether or not a female is near ovulation.
Sexual swelling in a female hamadryas baboon indicates she is ovulating. Unlike other primates, human females show no obvious outward signs of ovulation.
^Sandy J. Andelman (June 1987). "Evolution of Concealed Ovulation in Vervet Monkeys (Cercopithecus aethiops)". The American Naturalist. 129 (6): 785–799. doi:10.1086/284675. S2CID 83522515.
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considered to have concealedovulation because there is no outward physiological sign, either to a woman herself or to others, that ovulation, or biological...
Several explanations have been proposed to explain concealedovulation in humans. Females near ovulation experience changes in the cervical mucus, and in...
breeding system and persuaded to invest effort—the better. By evolving concealedovulation and continuous receptivity, females force males into longer periods...
Women can only get pregnant while ovulating. Human ovulation is concealed, or not signaled externally. Concealedovulation decreases paternity certainty because...
had semi-concealedovulation, that was inherited by gorillas, and that later evolved in concealedovulation in humans and advertised ovulation in chimpanzees...
including concealedovulation. Female catarrhine primates such as hanuman langurs have evolved an extended estrous state with variable ovulation in order...
offspring from other males. Such hidden fertility has been coined concealedovulation, and is part of extended female sexuality. In addition to the incitement...
unlike most other species, have concealedovulation, a lack of obvious external signs to signal estral receptivity at ovulation (i.e., the ability to become...
chances of fathering the female's offspring. Human females exhibit concealedovulation, also known as hidden estrus, meaning it is almost impossible to...
has conducted considerable research pointing to the existence of concealedovulation in humans. "Steven Gangestad". The University of New Mexico. Retrieved...
while driving Sex Activity Adult attachment Age disparity Arousal Concealedovulation Coolidge effect Desire Fantasy Hormonal motivation Jealousy Mate...
tough coat surrounding the eggs of some insects and fish. cleavage concealedovulation conception delamination deuterostome developmental biology diakinesis...
hypothesized that this could be due to the adaptive benefits of concealedovulation and extended sexuality.[page needed][page needed] However, research...
challenge hypothesis and human behavior, or the human nature of concealedovulation, although some suggest it may apply. Another line of research has...
is supported by a number of modern human traits associated with concealedovulation (permanently enlarged breasts, lack of sexual swelling) and low sperm...
well as by mothers, having sex in private rather than in public, concealedovulation, female sexual receptivity encompassing most of the menstrual cycle...
that this could represent a constraint in the evolution of sperm. Concealedovulation Strategic pluralism Sociobiological theories of rape Polygamy in...
while driving Sex Activity Adult attachment Age disparity Arousal Concealedovulation Coolidge effect Desire Fantasy Hormonal motivation Jealousy Mate...
estrus, at which time ovarian follicles are maturing and ovulation can occur. Evidence of ovulation, the phase during which conception is most probable, is...
while driving Sex Activity Adult attachment Age disparity Arousal Concealedovulation Coolidge effect Desire Fantasy Hormonal motivation Jealousy Mate...
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