estrous cycle , także: estrus cycle

However, hormones of the estrous cycle seem to be involved.

This is the time at which female dogs will have their first estrous cycle.

The female estrous cycle is shorter, but happens in this time.

Domestication can affect estrous cycles due to changes in the environment.

The estrous cycle in the female is 28 days with a three-day period of estrus.

In an estrous cycle, the lining degenerates back to normal size.

P4 is highest in the diestrus phase of the estrous cycle.

This synchronization of the estrous cycle is known as the Whitten effect.

Females in an estrous cycle attract males with a loud whistle.

Female house mice have an estrous cycle about four to six days long, with estrus itself lasting less than a day.

Female mountain tapirs have a 30-day estrous cycle, and typically breed only once every other year.

Even within species significant variability can be observed, thus cats may undergo an estrous cycle of 3 to 7 weeks.

The main risk period for a female is for eight weeks after her peak standing heat (or estrous cycle) has ended.

Estrous cycle duration was of about 33 days.

Anovulation was rare in winter, which suggested the effect of seasons on the estrous cycle.

Estrus last 6 days on average, estrous cycle averages 30 days.

The estrous cycle lasts roughly 24 days, and females experience an anovulatory period in spring.

Males tend to show more aggression and urine-marking around the time of the females' estrous cycle.

They will experience subsequent estrous cycles biannually, during which the body prepares for pregnancy.

Seemed like years, waiting three weeks at a time for some bureaucrat to get over her estrous cycle so we could get an appointment.

The female has an estrous cycle of 44 days, with the estrus lasting five to ten days.

Equines which are not in foal generally have a seasonal estrous cycle, from early spring into autumn.

The estrous cycle is 21 days, with females receptive to sexual advances between three and 10 days.

The duration of the estrous cycle is 4-5 days and estrus itself lasts about 12 hours, occurring in the evening.