Question

Foetal ejection reflex in human female is induced by

• A. pressure exerted by amniotic fluid
• B. release of oxytocin from pituitary
• C. fully developed foetus and placenta
• D. differentiation of mammary glands

Answer 1

The correct option is B release of oxytocin from pituitary

Foetal ejection reflex is an accelerated active labor and birth which is induced by release of oxytocin from the pituitary. Oxytocin (child birth hormone), secreted by neurohypophysis of pituitary gland, stimulates contraction of uterus muscles, including labour pain for child birth, when secretion of progesterone hormone declines, marking the end of pregnancy. As the sensory impulse of increasing labour pain reaches hypothalamus, more and more oxytocin is released from posterior pituitary under a positive feedback regulation.