Milk Ietdown hormone is ______

  1. Oestrogen
  2. Progesterone
  3. Oxytocin
  4. Prolactin 

Answer (Detailed Solution Below)

Option 3 : Oxytocin
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Detailed Solution

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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.
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