which of the following can be termed as milk ejectig hormone?

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the hormone responsible for milk ejection during breastfeeding.

2. **Identifying Relevant Hormones**: After childbirth (parturition), several hormones are involved in lactation. The two main hormones to consider are prolactin and oxytocin.

3. **Role of Prolactin**: Prolactin is the hormone responsible for the synthesis (production) of milk in the mammary glands. However, it does not play a role in the ejection of milk.

4. **Role of Oxytocin**: Oxytocin is the hormone that causes the contraction of the myoepithelial cells in the mammary glands, which leads to the ejection of milk from the breast. This process is often referred to as the "milk let-down reflex."

5. **Evaluating Other Hormones**:
- **Estrogen**: Primarily involved in the development of sexual characteristics and reproductive organs, not in milk ejection.
- **Progesterone**: Involved in maintaining pregnancy and the endometrial lining, not in milk ejection.

6. **Conclusion**: Among the options provided, oxytocin is the correct answer as it is the hormone responsible for milk ejection.

**Final Answer**: The milk ejecting hormone is **oxytocin**.

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