In a September 2019 study in Obstetrics & Gynecology it was shown that women with endometriosis tend to have more medical problems in pregnancy.
Women who have had proven endometriosis are known to have more infertility, but the problems do not stop once they conceive.
Women with endometriosis in this new study have more problems with diabetes in pregnancy, with high blood pressure in pregnancy, with delivering before being full term, and have more problems with their babies being under weight.
There has been a few research studies with conflicting reports of the association of pregnancy problems and endometriosis.
No one cause has been determined, but the more we know about adenomyosis, which is endometriosis of the uterus itself, the more we have looked to problems with the placenta leading to the problems in pregnancy with the women who have had confirmed endometriosis.
Studies are confusing, as many women who have had proven endometriosis are actually older when they conceive. For some women their increased age and weight could account for some of thse same problems.
It means that you need to be as healthy as possible when you enter pregnancy, so come in for a check up before discarding contraception.