What are the etiologies of primary amenorrhea with secondary sexual char?

First always rule out pregnancy Then see anatomical malformations (imperforated hymen- pelvic pain, congenital aplasia of vagina- antimullerian duct growth seen by laproscopy/ceoloscopy, Post-TB uterine synechiae seen by hysterography) Then anorexia nervosa (respond to contraceptives) Then simple delay of menarche in case we ruled out all causes