If a woman is breastfeeding while shes pregnant, does her estrogen level affect the babys health?
No, we do not believe serum estrogen levels relate very well to estrogen levels in breast milk, unless the woman is taking exogenous estrogens. We are currently unaware of an effect on the breastfed baby or a medical contraindication related to breastfeeding while pregnant as long as the mother is relatively fit and healthy (e.g., good nutritional status, low fatigue). Breastfed babies may wean during pregnancy because the breast milk may change qualitatively (e.g., changes in volume, changes in “taste”).
