Our ISIS BABY gummies contain sage, whose hormone-like molecules mimic the estrogens we produce naturally. This is what makes it effective in stimulating ovulation (estrogen being the star hormone of this phase of the cycle).
Unfortunately, people who suffer from endometriosis often have high estrogen levels (although the science is not yet certain, the estrogen/progesterone imbalance could be at the origin of the disease). Adding phytoestrogens could worsen the symptoms of the disease, particularly pain.
However, during PMA courses, synthetic estrogens are anyway administered to stimulate ovulation. Talk to your doctor to be able to assess the benefit/risk in your specific case.