When are oral contraceptives contraindicated after pregnancy?

Oral contraceptives are contraindicated while breastfeeding and within the first 6 weeks postpartum due to the increased risk of thromboembolism and potential effects on milk production. During this time, especially within the first 21 days postpartum, women are at a heightened risk for venous thromboembolism due to the hypercoagulable state that occurs after childbirth. Additionally, estrogen-containing contraceptives can reduce milk supply, which is particularly concerning for breastfeeding mothers.

The recommendation to avoid these contraceptives during this period helps ensure the safety and health of both the mother and the infant, as breastfeeding is important for neonatal health. After the initial 6-week postpartum period, it is generally safer for breastfeeding mothers to start combination oral contraceptives, as their thromboembolic risk decreases, and they typically will have established a consistent milk supply.

This makes the correct option clear, as it emphasizes the critical postpartum period where both the mother's recovery and breastfeeding are paramount.