During parturition in humans, the signals originating from the fully developed foetus and the placenta induce mild uterine contractions known as the foetal ejection reflex. This reflex directly triggers the release of:

Step-by-step solution

The process of parturition is induced by a complex neuroendocrine mechanism. The signals for parturition originate from the fully developed foetus and the placenta, which induce mild uterine contractions called the foetal ejection reflex. This reflex triggers the release of oxytocin from the maternal posterior pituitary gland. Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn stimulates further secretion of oxytocin. The stimulatory reflex between the uterine contraction an