The hormone which stimulates the 'let down' release of milk from Mother's breast when the baby is suckling is

Options

A. Prolactin
B. Progesterone
C. Oxytocin
D. relaxin

Answer

To solve the question regarding the hormone that stimulates the 'let down' release of milk from a mother's breast when the baby is suckling, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The question is about lactation, which is the process of milk production and release in mammals, particularly in humans after childbirth.

2. **Identify Key Hormones**: The main hormones involved in lactation are:
- **Prolactin**: Stimulates milk production but does not directly cause milk release.
- **Oxytocin**: Stimulates the contraction of the smooth muscles in the mammary glands, leading to milk ejection.
- **Estrogen**: Primarily involved in the maintenance of pregnancy and does not directly affect milk release.
- **Relaxin**: Involved in preparing the body for childbirth but does not play a direct role in milk ejection.

3. **Analyze the Options**: Based on the functions of these hormones:
- Prolactin is important for milk production but not for the 'let down' reflex.
- Estrogen and relaxin do not directly facilitate milk release.
- Oxytocin is known for its role in both uterine contractions during labor and the ejection of milk during breastfeeding.

4. **Conclude the Correct Answer**: Since the question specifically asks for the hormone that stimulates the release of milk when the baby suckles, the correct answer is **Oxytocin**.

### Final Answer:
The hormone which stimulates the 'let down' release of milk from the mother's breast when the baby is suckling is **Oxytocin**.

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