The gestation period of the human is about 38 weeks followed by birth. The process of giving birth to a baby is called parturition. It starts with the rise in oestrogen/progesterone ratio, increase in the level of oxytocin secretion by both, mother and foetus. Parturition is induced by a complex neuroendocrine mechanism. The signals for parturition originate from the fully developed foetus and the placenta, which induces mild uterine contractions called foetal ejection reflex.