Successful pregnancy in morbidly obese lady with polycystic ovary syndrome after bariatric surgery: A case report

•We report a case of a 40-year-old lady with primary infertility for six years with underlying polycystic ovary syndrome (PCOS) and BMI 45.7 whom was successfully conceived twice following bariatric surgery procedure.•Bariatric surgery in morbidly obese lady helps to achieve reduction of 70% of her BMI and lead to her spontaneous conception without fertility intervention and successful live birth.•Obese PCOS needs multidisciplinary approaches which include weight loss programme such as dietary advice, exercise intervention as preliminary treatment prior to ovulation induction and counselling.•Bariatric surgery such as laparoscopic sleeve gastrectomy should be considered more often in contrast to lifestyle modification for morbidly obese lady with PCOS and infertility prior to the use of her standard ovulation induction regime for treating her infertility.