Continued secretion of milk is maintained by

Options

A. Prolactin
B. LH
C. Relaxin
D. STH

Answer

To answer the question "Continued secretion of milk is maintained by," we can follow these steps:

### Step 1: Identify the hormones involved in milk secretion
- The main hormone responsible for the production and secretion of milk in mammals is prolactin.

### Step 2: Understand the role of prolactin
- Prolactin is also known as the lactogenic hormone and is produced by the anterior pituitary gland. Its primary function is to stimulate the mammary glands to produce milk during and after pregnancy.

### Step 3: Evaluate the other options
- **LH (Luteinizing Hormone)**: This hormone is involved in the regulation of the menstrual cycle and ovulation in females and stimulates testosterone production in males. It does not play a direct role in milk secretion.

- **Relaxin**: This hormone is secreted by the placenta and helps in childbirth by relaxing the cervix and pelvic ligaments. It does not contribute to milk production.

- **FTH (Somatotropin or Growth Hormone)**: This hormone is responsible for growth and metabolism but does not directly influence milk secretion.

### Step 4: Conclude the answer
- Based on the roles of the hormones discussed, the correct answer to the question is **prolactin**. It is the hormone that maintains the continued secretion of milk.

### Final Answer:
Continued secretion of milk is maintained by **prolactin**.

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