text: for women who battle endometriosis, how effective is birth control in treating endometriosis? my gyno says that most likely, based on my symptoms and family history of endo. that i probably have it. he has put me on birth control and i wonder how effective it really is. for me, eighteen months of ortho tri-cyclen worked wonders.  i've been off it for three years and i haven't had another bout of endometriosis.  if your gyno suggests birth control, i would advise you to give it a go.