What happens to corpus luteum in human female if the ovum is (i) fertilized, (ii) not fertilized ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Corpus Luteum**: The corpus luteum is a temporary endocrine structure formed from the remnants of the ovarian follicle after ovulation. It plays a crucial role in the menstrual cycle and early pregnancy.

2. **Case (i): If the Ovum is Fertilized**:
- When the ovum (secondary oocyte) is fertilized by sperm, it develops into an embryo.
- The presence of the embryo signals the body to maintain the endometrial lining of the uterus, which is essential for the embryo's nourishment.
- The corpus luteum continues to produce progesterone, a hormone crucial for maintaining the endometrial lining, preventing its breakdown.
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