Question

Under the effect of that hormone, which organ of the female reproductive system starts to contract and thereby birth process (Parturition) is facilitated?

Answer 1

Under the effect of oxytocin, the uterus (specifically its muscular middle layer, called the myometrium) starts to contract strongly. These powerful, rhythmic contractions push the fully developed fetus downward toward the cervix and out through the birth canal (vagina), thereby facilitating the process of childbirth (parturition).