Foetal ejection reflex triggers the release of:

The correct answer is Option (2) → Oxytocin

Option (2) Oxytocin — Correct. Signals from the fully developed foetus and placenta cause mild uterine contractions, called the foetal ejection reflex. This triggers the release of oxytocin from the maternal pituitary, which causes stronger contractions and leads to the expulsion of the baby.

Note: A similar question was also asked in CUET (UG) 2026 on 14-05-2026 (Slot 1).

NCERT Extract:
Parturition and Lactation – “… The signals for parturition originate from the fully developed foetus and the placenta which induce mild uterine contractions called foetal ejection reflex. This triggers release of oxytocin from the maternal pituitary. Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn stimulates further secretion of oxytocin.”