1. This synchronization of the estrous cycle is known as the Whitten effect. 2. In an estrous cycle , the lining degenerates back to normal size. 3. Anovulation was rare in winter, which suggested the effect of seasons on the estrous cycle . 4. Humans, some other primates, bats, and shrews menstruate; other animals, including dogs, have estrous cycles . 5. Males tend to show more aggression and urine-marking around the time of the females'estrous cycle . 6. The female's estrous cycle lasts 25 28 days . Mating season begins in April to May. 7. Furthermore, " Clock " mutants demonstrate disrupted estrous cycles and increased rates of full-term pregnancy failure. 8. Estrous cycles start after sexual maturity in females and are interrupted by anestrous phases or pregnancies.9. Humans have menstrual cycles rather than estrous cycles . 10. The endometrial lining is either reabsorbed ( estrous cycle ) or shed ( menstrual cycle ).
