First, there are case reports of endometriosis being treated successfully by aromatase inhibitors, which is the class of drug
femara is from. Second,
femara results in a thicker, better looking endometrium, than clomid. On the other hand, femara is more likely to result in one egg being released, rather than multiple. I don't know of any info regarding clomid making endometriosis coming back more quickly. Why have you been prescribed femara?