Step 1: Parturition is the scientific term for the process of giving birth or the expulsion of the fetus from the uterus. Step 2: It is induced by a complex neuroendocrine mechanism involving hormones like cortisol, estrogens, and oxytocin. Step 3: The signals for parturition originate from the fully developed fetus and the placenta, which induce mild uterine contractions called the fetal ejection reflex.