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If a woman does not become pregnant, the woman has her monthly period, and the uterine lining sheds. What happens next?

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Answer:

If one of the sperm cells penetrates the egg(ur pergnat) , the egg is fertilized and begins developing. The egg takes several days to travel down the fallopian tube into the uterus. After it is in the uterus, a fertilized egg usually attaches to (implants in) the lining of the uterus (endometrium).

Step-by-step explanation: