Search results
Results from the WOW.Com Content Network
A mare may be in heat for 4 to 10 days, followed by approximately 14 days in diestrus. Thus, a cycle may be short, totaling approximately 3 weeks. [ 21 ] Horses mate in spring and summer; autumn is a transition time, and anestrus occurs during winter.
Females of most mammal species advertise fertility to males with visual behavioral cues, pheromones, or both. [9] This period of advertised fertility is known as oestrus, "estrus" or heat. [9] In species that experience estrus, females are generally only receptive to copulation while they are in heat [9] (dolphins are an exception). [10]
The muscles around a male's scrotum involuntarily tighten if the man's body temperature drops, and they loosen, allowing the testes to hang, if the body temperature rises. This is the body's way of keeping the sperm at an ideal temperature. [citation needed] This means that sperm production can be disrupted with increased temperature. [1]
This data indicates that the youngest males don't try as hard as older males to find a mate. [11] The energy expenditure of chasing and fighting during the breeding season can result in a buck losing an immense amount of weight, with some research documenting losses of as much as 20% of body weight with some sources showing body mass losses of ...
Under the best-male hypothesis, the male with whom the female eventually copulates is the result of indirect mate choice, [17] as the female does not have to directly assess the fitness of each potential partner; rather, her sexual swelling attracts competing males and results in the benefit of increased viability of her offspring. [66]
Male arousal will lead to an erection, and in female arousal, the body's response is engorged sexual tissues such as nipples, clitoris, vaginal walls, and vaginal lubrication. [1] Mental stimuli and physical stimuli such as touch, and the internal fluctuation of hormones, can influence sexual arousal. Sexual arousal has several stages and may ...
Men can do the same,” says Alex Robboy, a sex therapist in Philadelphia. Essentially, kegel exercises are a way of contracting the muscles of the pelvic floor, which give you greater control and ...
As sex-determining mechanisms, TSD and genetic sex determination (GSD) should be considered in an equivalent manner, [8] which can lead to reconsidering the status of fish species that are claimed to have TSD when submitted to extreme temperatures instead of the temperature experienced during development in the wild, since changes in sex ratio ...