Step 3: Clarify the options provided. The first option suggests the oocyte remains dormant in the ovary, which is incorrect because the oocyte is released during ovulation and does not return to the ovary. The second option states the oocyte degenerates and is reabsorbed or expelled during menstruation, which aligns with the biological process. The third option suggests the oocyte fuses with a polar body to form a zygote, which is incorrect because fertilization involves a sperm cell, not a polar body. The fourth option suggests the oocyte continues to divide and develop into an embryo, which only happens if fertilization occurs.