What is oestral cycle? List of events which occour in this cycle...
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Explanation:
The oestrous cycle is the reproductive system in most mammals. Reproductive hormones cause the cycles to start after puberty in sexually mature females. They are interrupted by non-breeding phases or by pregnancies. Usually estrous cycles continue until death.
The Estrous cycle can be divided into four stages:
1) Proestrus,
2) Estrus,
3) Metestrus, and
4) Diestrus.
During proestrus the CL regresses (progesterone declines) and a preovulatory follicle undergoes its final growth phase (estradiol increases). Ovulation usually occurs during estrus (cows ovulate during metestrus).
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the mojority of mammal became sexually receptive and ovalate spontaneously at defined interval . The female will allow the male to mate during restricted time coincuding with ovalution.
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