What is sexual maturation? How does menstruation occur? What is the function
of placenta during pregnancy?
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Explanation:
The fertilized egg attaches to the lining of the uterus. The placenta then develops. The placenta transfers nutrition and oxygen to the fetus from mother. If the egg does not become fertilized, the lining of the uterus (endometrium) is shed during menstruation.
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Hey there!
As brainly was not allowing some words to write here.. i have wrote the answer and attached it in the form of document.
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