Question

dog is a non-primate so oestrous cycle occurs in the female dogs , and we knw dat oestrous cycle does not cause bleeding . How ?

Answer 1

Yes, in oestrous cycle which is found in non-primates, no menstrual bleeding occurs. The cyclical changes in the ovaries occur due to the reproductive hormones in these mammals. But in absence of pregnancy, the uterus lining is not shed but is reorganized for the next cycle, unlike primates mammals in which prepared uterus lining is shed in the form of menstrual bleeding in absence of pregnancy.