If the ovum does not get fertilized, the uterus sheds its lining thus, leading to ______________

Answer

**Step-by-Step Solution:**

1. **Understanding Ovum and Fertilization**: The ovum (egg) is released from the ovary during the menstrual cycle. If it is not fertilized by sperm, it cannot develop into a zygote.

2. **Uterine Lining Preparation**: Each month, the uterus prepares for a possible pregnancy by thickening its lining (endometrium) to support a fertilized egg.

3. **Lining Shedding**: If fertilization does not occur, the body signals the uterus to shed its lining. This is a natural part of the menstrual cycle.

4. **Menstrual Cycle**: The shedding of the uterine lining, along with the unfertilized ovum, results in what is known as menstruation or menstrual bleeding.

5. **Duration of the Cycle**: This process typically occurs every 28 days and is a regular cycle that continues from puberty until menopause, which usually occurs around the age of 50.

6. **Hormonal Influence**: Hormones such as estrogen and progesterone play significant roles in regulating the menstrual cycle and the process of shedding the uterine lining.

7. **Conclusion**: Therefore, if the ovum does not get fertilized, the uterus sheds its lining, leading to **menstrual bleeding**.

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