En 1680-6433 2008-2177 Spontaneous ovarian hyperstimulation syndrome in a patient presenting with missed abortion Background: Spontaneous ovarian hyperstimulation syndrome rarely occurs during pregnancy and is usually associated with high levels of human chorionic gonadotropin, in conditions such as molar or multifetal pregnancies. Case report: Here we report spontaneous ovarian hyperstimulation in a patient presenting with missed abortion at 16th week of gestation, when serum ß-subunit human chorionic gonadotropin level detected to be 400 milliunit per milliliter. Evacuation and curettage was performed and the ovaries returned to about normal size two months later. Conclusion: Spontaneous ovarian hyperstimulation syndrome can develop even in the presence of very low levels of hCG in missed abortion Background: Spontaneous ovarian hyperstimulation syndrome rarely occurs during pregnancy and is usually associated with high levels of human chorionic gonadotropin, in conditions such as molar or multifetal pregnancies. Case report: Here we report spontaneous ovarian hyperstimulation in a patient presenting with missed abortion at 16th week of gestation, when serum ß-subunit human chorionic gonadotropin level detected to be 400 milliunit per milliliter. Evacuation and curettage was performed and the ovaries returned to about normal size two months later. Conclusion: Spontaneous ovarian hyperstimulation syndrome can develop even in the presence of very low levels of hCG in missed abortion Ovarian hyperstimulation syndrome, Spontaneous pregnancy, Missed abortion Ovarian hyperstimulation syndrome, Spontaneous pregnancy, Missed abortion 105 107 - - Bibi Shahnaz Aali - No