If the egg does not become fertilized as it travels down the fallopian tube on its way to the uterus, the endometrium (lining of the uterus) is shed and passes through the vagina (the passageway through which fluid passes out of the body during menstrual periods, also called the birth canal), a process called ...
When the egg is not fertilized, the thick uterus lining breaks down. The blood, tissues and the non-fertilized egg come out of the vagina as menstruation.
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If the egg does not become fertilized as it travels down the fallopian tube on its way to the uterus, the endometrium (lining of the uterus) is shed and passes through the vagina (the passageway through which fluid passes out of the body during menstrual periods, also called the birth canal), a process called ...
When the egg is not fertilized, the thick uterus lining breaks down. The blood, tissues and the non-fertilized egg come out of the vagina as menstruation.