The corpus luteum is maintained during pregnancy by :-

Options

A. HCG
B. LH
C. Estrogen
D. Progesterone

Answer

**Step-by-Step Solution:**

1. **Understanding Corpus Luteum**: The corpus luteum is a temporary endocrine structure in the ovaries that forms after ovulation. Its primary function is to produce hormones, particularly progesterone, which is crucial for maintaining pregnancy.

2. **Role of Human Chorionic Gonadotropin (hCG)**: During pregnancy, the hormone human chorionic gonadotropin (hCG) is produced by the developing placenta shortly after fertilization. This hormone signals the corpus luteum to continue producing progesterone, which is essential for maintaining the uterine lining and supporting the early stages of pregnancy.

3. **Evaluating the Options**:
- **Option A: hCG** - This is the correct answer as it is responsible for maintaining the corpus luteum during pregnancy.
- **Option B: Luteinizing Hormone (LH)** - While LH is important for ovulation and the formation of the corpus luteum, it does not maintain it during pregnancy.
- **Option C: Estrogen** - This hormone plays a role in regulating the menstrual cycle and supporting pregnancy but does not maintain the corpus luteum.
- **Option D: Progesterone** - Although it is crucial for maintaining pregnancy, it is not the hormone that maintains the corpus luteum; rather, it is produced by the corpus luteum itself.

4. **Conclusion**: Based on the analysis of the options, the correct answer is that the corpus luteum is maintained during pregnancy by human chorionic gonadotropin (hCG).

**Final Answer**: The corpus luteum is maintained during pregnancy by human chorionic gonadotropin (hCG).

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