I am not sure femara is better than clomid, but in theory there are a couple of good reasons
for femara in your case. 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.