Question

The Fetal ejection reflex in humans triggers

• A. placental delivery
• B. release of oxytocin from maternal pituitary
• C. release of HCG from the placenta
• D. release of oxytocin from the fetal pituitary

Answer 1

The correct option is B

release of oxytocin from maternal pituitary

Signals from a fully grown foetus and its placenta induce mild contractions in the uterus known as the fetal ejection reflex. This triggers a neuroendocrine loop which stimulates the mother’s pituitary gland to secrete oxytocin, which in turn increases uterus contractions.