Letrozole vs. Clomiphene Citrate in Patients With Anovulatory Infertility

Inclusion Criteria: * Females with anovulatory infertility 20-38 years of age. * Diagnosis of anovulatory infertility as established by standard criteria. * Normal Pelvic USG and bilateral tubal patency * Willingness and giving written Informed Consent. Exclusion Criteria: * Uterine and adnexal pathology e.g. leiomyomata * Ovarian cyst * Hyperprolactinaemia * Hyperthyroidism or Hypothyroidism\* * FSH \>9mIU/ml (during early follicular phase).\* (As per Chemoluminescence method) * Previous surgery related to genital tract as per history * Appendicitis, peritonitis, genital tuberculosis as per history and/or having an abnormal pelvic anatomy * Impaired hepatic /renal function * Diabetes mellitus/Random blood sugar- \> 140mg/dl * Drugs likely to interfere with ovulation * Alcohol intake as per history * History of hypersensitivity to the study drug or to its excipients * Planned travel outside the study area for a substantial portion (\>5 days) of the study period by potential participants * Lack of willingness to give informed written consent * Participation in any clinical study within the preceding 1 month