Milk Ietdown hormone is ______

The correct answer is Oxytocin.

• Milk letdown means the ejection of a mother's milk from the alveoli of the breast into the mammary ducts and to the nipple.
• When the nipple is sucked the Prolactin acts on the milk-making tissues.
• The Oxytocin hormone causes the breast to push out or 'let down' the milk.

Additional Information

Prolactin

• Prolactin is a hormone produced by the pituitary gland which sits at the bottom of the brain.
• Prolactin causes breasts to grow and develop and causes milk to be made after a baby is born.

Oestrogen

• Oestrogen is the primary female sex hormone.
• It is responsible for the development and regulation of the female reproductive system and secondary sex characteristics.

Progesterone

• Progesterone prepares the endometrium for the potential of pregnancy after ovulation.
• It triggers the lining to thicken to accept a fertilized egg.