👉 Hysterogenesis is a biological process that occurs in the developing embryo during embryonic development. It refers to the initial growth and development of organs or tissues in the body, which is followed by a period of rest and closure of these structures. In the case of the human fetus, this process often begins during the first trimester or early second trimester of pregnancy when the mother's body prepares for labor by releasing substances called "hysterogens". These hormones include progesterone, which helps to
