Ovarian hyperstimulation syndrome in a spontaneous pregnancy: A potential for missed-diagnosis

Ovarian hyperstimulation syndrome (OHSS) with the natural ovulatory cycle is extremely rare. We report a case of severe OHSS associated with a spontaneous normal singleton pregnancy in a 23-year-old woman presenting with severe abdominal pain, vomiting, and dyspnea. Ultrasonography revealed 10 weeks viable intra-uterine single fetus with bilateral multilocular cystic ovarian masses and ascites. She had supportive therapy inclusive of oral bromocriptine with complete resolution of OHSS and an eventual uncomplicated normal vaginal delivery at 39 weeks of pregnancy.