<prompt> Not a cause for secondary amenorrhea -PregnancyPCODHyperprolactinaemiaTurner syndrome  <response>: Ans. is d i.e., Turner syndrome Causes of secondary amenorrheaPhysiologicalo Pregnancyo LactationPathologicalGenital tracto Acquired stenosisatresia of cervical canal following Electrocauterization, chemical bums cervical amputation in Fothergills repair, following conization forCIN genital TB.o Ashermans syndromeo Vesicovaginal fistulaOvaryo Surgical extirpationo Radiotherapyo Autoimmune diseaseo Induction of multiple ovulation in infertility 1t premature menopauseo POODo Resistant ovarian syndromeo Infections mumps, TB etco Masculinising ovarian tumourso Premature menopauseNutritionalo Anorexia nervosa, bulimiao Extreme obesityo Excessive weight loss in athletes ballet dancersPituitaryo Simmonds diseaseo Sheehan syndromeo Hyperprolactinaemiao Tumours like prolactinomas, chromophobe adenomaso Cushings diseaseo Empty sella syndromeo Drugs - tranquillizers, OCPs, metaclopramide, dopamine blockers, antihypertensives, antidepressants, cimetidine phenothiazine.Hypothalamuso GnRH deficiencyo Vigorous exerciseo Pseudocyesiso Brain tumourso Anorexia nervosaSuprarenalo Addisons diseaseo Adrenogenital syndromeo Suprarenal tumoursThyroido Hypothyroidismo Chest wall lesionso Graves diseaseOthero Diabeteso Tuberculosis-liver diseaseo Renal diseaseo Severe anaemia, malnutrition 