what happens when the egg is not fertilised ?
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After it is in the uterus, a fertilized egg usually attaches to (implants in) the lining of the uterus (endometrium). But not all fertilized eggs successfully implant. If the egg is not fertilized or does not implant, the woman's body sheds the egg and the endometrium.
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1. the uterus prepare itself every month to receive fertilized egg.
2. the linning of the uterus becomes thick and spongy ,required to support the embro.
3. when fertilization had not taken place ,this linning ins not needed any longer .
4.this lining breaks and comes out through vagina as blood and mucus .This cycle takes around 28 days every month and called menstruation.
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