Foetal ejection reflex in human female is induced by:
release of oxytocin from pituitary
fully developed foetus and placenta
differentiation of mammary glands
pressure exerted by amniotic fluid
The correct option is “Fully developed foetus and placenta”.
Towards the end of pregnancy, the uterus contracts vigorously, causing the foetus to be expelled or delivered (parturition). The placenta and fully grown foetus are the sources of parturition, which results in the modest uterine contractions known as the foetal-ejection reflex.