Ovarian hyperstimulation syndrome (OHSS) usually occurs up to %10 of women who use especially gonadotropins for artificial fertilization methods, becomes more intense with embryonic implantation, and is associated with high miscarriage rate. Severe forms complicate ~1% of IVF cycles and in the most marked cases, thromboembolic phenomena may occur as a result of hemoconcentration and coagulation disturbances. Severe OHSS is rare in case of spontaneous ovulation and always reported during pregnancy. We present a severe OHSS complicated with femoral and popliteal deep and superficial venous thrombosis in a 11 weeks pregnant women with spontaneous conception.
Keywords: spontaneous ovarian hyperstimulation, deep venous thrombosis, hypercoagulability.