Follicles size mature

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Reproductive activity of the cow in the postpartum period. The role of the embryonic hormone, which the above substance appears to be, may be to counter the lytic action of the prostaglandins. Endocrine changes prior to ovulation in suckled and non-suckled postpartum cows compared to cycling cows. The reproductive cycle of the cow is mainly coordinated by hormones produced by the hypothalamus, pituitary and ovary. The last authors observed this peak in non-pregnant cattle and those inseminated but failing to conceive. Estrogen induced release of luteinizing hormone in prepubertal and postpubertal heifers.

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