A postpartum patient asks when menstruation typically resumes after birth. Which response is most accurate?

• A. Not until 1 year after birth
• B. About 3-4 months after birth
• C. Immediately after birth
• D. About 5-6 weeks after birth

Answer: (D)

Postpartum menstruation resumes as the hormonal system shifts back toward normal cycling after pregnancy. When a mother is not exclusively breastfeeding, prolactin levels decrease enough in the weeks after birth to allow the hypothalamic-pituitary-ovarian axis to restart, so ovulation and a new menstrual period can occur. The most common timeframe for this return is about five to six weeks after delivery. If breastfeeding is frequent, lactational amenorrhea can delay menses for several months because high prolactin continues to suppress GnRH and ovulation. While individual variation exists, five to six weeks is the typical answer for those not experiencing prolonged lactational suppression.