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प्रश्न
What is menstruation? Explain.
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उत्तर
In females, the reproductive phase of life begins at puberty (10 to 12 years of age) and generally lasts till the age of approximately 45 to 50 years. The ova begin to mature with the onset of puberty. In about 28 to 30 days, one of the ovaries matures and releases one ovum. During this period, the wall of the uterus becomes thick so as to receive the egg, in case it is fertilised and begins to develop. This results in pregnancy. If fertilisation does not occur, the released egg, and the thickened lining of the uterus, along with its blood vessels, are shed. This causes bleeding in women, which is called menstruation.
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संबंधित प्रश्न
Reproductive age in women starts when their ______.
The male and the female gamete fuse together and form ______.
Explain the process of pregnancy.
For the metamorphosis of tadpoles which of the following elements must be available in water?
Unscramble the underlined word in the following sentence.
Reproductive life of a woman lasts from hacreemn to spauoemen.
The release of the ovum from the ovary is called ______.
______ is a temporary endocrine gland formed during pregnancy.
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