Final answer:
Women can bear children from their first ovulation until they reach menopause, which signals the end of natural reproductive capability.
Step-by-step explanation:
Women can bear children from the first ovulation until they reach menopause. Menopause is defined as the cessation of the menstrual cycle and typically occurs when a woman is between her mid-40s to mid-50s.
It marks the end of a woman's reproductive years when the ovaries no longer produce viable eggs due to the loss of sensitivity to Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH). As a result, women can no longer conceive children naturally after menopause. The correct answer to the student's question is A) Menopause.