During pregnancy degeneration of corpus luteum is prevented by the hormone

Options

A. hCG
B. hPL
C. LH, estrogen and estradiol
D. Relaxin.

Answer

**Step-by-Step Solution:**

1. **Understanding Corpus Luteum**: The corpus luteum is a temporary endocrine structure that forms in the ovary after ovulation. It is responsible for producing progesterone, which is crucial for maintaining the uterine lining during early pregnancy.

2. **Role of Progesterone**: Progesterone is essential for preparing the endometrium (the inner lining of the uterus) for a potential implantation of a fertilized egg. If pregnancy occurs, maintaining the corpus luteum is vital for continued progesterone production.

3. **Hormonal Changes During Pregnancy**: When a fertilized egg implants in the uterus, it triggers hormonal changes. One of the key hormones involved in this process is Human Chorionic Gonadotropin (HCG).

4. **Function of HCG**: HCG is produced by the developing placenta shortly after implantation. Its primary role is to signal the corpus luteum to continue producing progesterone, thereby preventing its degeneration. This is crucial for maintaining the pregnancy until the placenta can take over hormone production.

5. **Conclusion**: Therefore, the hormone that prevents the degeneration of the corpus luteum during pregnancy is Human Chorionic Gonadotropin (HCG).

**Final Answer**: The hormone that prevents the degeneration of corpus luteum during pregnancy is **HCG** (option A).

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