Sucking breasts during breastfeeding helps predominantly in the release of which hormone–

Correct option is D

Sol. The act of suckling during breastfeeding stimulates mechanoreceptors in the nipple, which send signals to the hypothalamus. This causes the posterior pituitary to release oxytocin, which triggers milk ejection (let-down reflex) by contracting myoepithelial cells around the mammary glands. Oxytocin also helps in uterine contractions post-delivery, aiding uterine involution. It plays a crucial role in maternal bonding and emotional well-being during breastfeeding.
Explanation of each option:
· (a) HCG – Human chorionic gonadotropin is produced by the placenta in early pregnancy and supports the corpus luteum; not involved in lactation.
· (b) Prostaglandin – These are involved in labor and inflammation, and uterine contractions, but not directly in milk ejection or breastfeeding reflexes.
· (c) Estrogen – Essential for breast development during pregnancy but inhibits milk secretion. It does not trigger the milk let-down reflex.
· (d) Oxytocin – Correct. It is the primary hormone responsible for milk ejection and is released in response to nipple stimulation during breastfeeding.