Menstrual cycle ceases during pregnancy. (True/False)

Answer

**Step-by-Step Solution:**

1. **Understanding the Menstrual Cycle**: The menstrual cycle is a monthly process that prepares a woman's body for potential pregnancy. It involves the thickening of the uterine lining (endometrium) in anticipation of a fertilized egg.

2. **Hormonal Changes During Pregnancy**: When pregnancy occurs, hormone levels, particularly progesterone and estrogen, rise significantly. These hormones are crucial for maintaining the uterine lining.

3. **Implantation of the Embryo**: For a successful pregnancy, the embryo must implant itself into the thickened uterine lining. This lining provides the necessary nutrients and support for the developing embryo.

4. **Ceasing of the Menstrual Cycle**: If the menstrual cycle were to continue, the uterine lining would shed, leading to menstruation. This shedding would result in the loss of the implanted embryo, effectively terminating the pregnancy.

5. **Duration of Menstrual Cycle Cessation**: The menstrual cycle remains ceased throughout the duration of the pregnancy, which lasts until parturition (the delivery of the baby).

6. **Conclusion**: Therefore, the statement "Menstrual cycle ceases during pregnancy" is **True**.

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