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प्रश्न
Explain the menstruation phases in the menstrual cycle of a human female.
स्पष्ट कीजिए
उत्तर
- During menstruation, the uterine lining, known as the endometrium, sheds along with blood vessels and tissue debris.
- If fertilization does not occur, this process is started by a reduction in estrogen and progesterone.
- Menstruation is the start of the menstrual cycle and usually lasts 3-7 day.
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