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[–]Comatoast 3 insightful - 2 fun3 insightful - 1 fun4 insightful - 2 fun -  (0 children)

Found these on my dig. Exogenous hormone exposure doesn't appear to be good things for breastmilk.

https://link.springer.com/article/10.1186/s40748-016-0040-y

In the WHO Medical Eligibility Criteria for Contraceptive Use (MEC), Fifth Edition [23] estrogen-containing contraceptives (including combined oral contraceptives, the patch, and the vaginal ring) are considered to pose unacceptable health risks (Category 4) when used by breastfeeding women within the first 6 postpartum weeks. These methods are considered by the WHO to have theoretical or proven risks that usually outweigh their advantages (Category 3) until breastfeeding women are at least 6 months postpartum. In contrast, in the U.S. Centers for Disease Control and Prevention Medical Eligibility Criteria for Contraceptive Use (CDC MEC), the advantages of using such estrogen-containing methods are stated to generally outweigh the theoretical or proven risks (Category 2) for women without complicating medical conditions starting 6 weeks after delivery [21] (Table 1).

https://www.nature.com/articles/7211251