In the event of pregnancy, the corpus luteum persists under the influence of

Options

A. LH
B. FSH
C. chorionic gonadotropin
D. progesterone.

Explanation

**Step-by-Step Solution:**

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

2. **Role of Hormones in Pregnancy**: During pregnancy, the maintenance of the corpus luteum is essential. If the corpus luteum degenerates, progesterone levels drop, which can lead to the termination of the pregnancy.

3. **Identifying the Key Hormone**: In the event of pregnancy, the hormone responsible for maintaining the corpus luteum is crucial. This hormone is produced by the trophoblast cells of the developing embryo.

4. **Human Chorionic Gonadotropin (hCG)**: The hormone that maintains the corpus luteum during pregnancy is human chorionic gonadotropin (hCG). It signals the corpus luteum to continue producing progesterone.

5. **Function of hCG**: Human chorionic gonadotropin not only maintains the corpus luteum but also stimulates it to secrete progesterone, which is vital for sustaining the endometrial lining of the uterus and supporting the pregnancy.

6. **Conclusion**: Therefore, in the event of pregnancy, the corpus luteum persists under the influence of human chorionic gonadotropin (hCG).

**Final Answer**: The corpus luteum persists under the influence of **human chorionic gonadotropin (hCG)**.

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