This is very different from the cyclical changes that occur in females While there is continuous sperm production in the male, the maturation and release of the ovum is cyclic and intermittent. The function and structure of virtually the entire female system is cyclic and these are the menstrual cycles.
Progesterone induces activity of the glandular epithelium.
The pregnant state induces a number of hormonal changes in the mother 1. Insulin secretion, in response to meals, increases after the third month. Reaches a peak during the third trimester. However, maternal sensitivity to insulin becomes depressed in second half. Thus, secretion may be compensatory.