Biology
Biology, 30.05.2021 07:20, Grayvtrain555

Menstruation occurs when. an unfertilized egg is expelled from the body
a fertilized egg is nonviable and is expelled from the body
a fertilized egg moves to the uterus.
the lining of the uterus is shed because an ovum has not been fertilized

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Menstruation occurs when. an unfertilized egg is expelled from the body
a fertilized egg is n...

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