Sexual intercourse cannot result in pregnancy prior to the middle of the proliferative stage. Explain why
What will be an ideal response?
Women must undergo a coordinated menstrual cycle to ensure that the uterus is ready to support the fertilized egg when it arrives. Prior to pregnancy, the old endometrial layer disintegrates and passes out of the women's body in the blood flow associated with menses. During the early stages of the proliferative stage, a new endometrial layer is produced, and by the middle stages, ovulation occurs. Therefore, even if sperm enters a woman's body during intercourse, fertilization and pregnancy is not possible until after the middle portion of the proliferative stage.
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