Barbara and all I'm not sure what is in the literture but I know of a woman who breastfed twins for an extended period and had extended relief from her symptoms of endometriosus. In fact it motivated her to continue breastfeeding as long as she did. She too had an infertility problem-don't know the details. Cindy RN, IBCLC, Lansing, the Capitol of Michigan MSU Grad Student