The correct answer is option 3, i.e. Oxytocin.
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Which hormone leads to the expulsion of milk from the breast during suckling?
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Oxytocin
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What is Oxytocin?
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- Oxytocin is the hormone that causes tiny muscles around the alveoli to squeeze the milk through milk ducts.
- Oxytocin is a hormone that acts on organs in the body (including the breast and uterus) and as a chemical messenger in the brain, controlling key aspects of the reproductive system, including childbirth and lactation, and aspects of human behaviour.
- It is sometimes referred to as the "love hormone," because levels of oxytocin increase during hugging and orgasm.
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