Severe ovarian hyperstimulation syndrome in a twin pregnancy after intracytoplasmic sperm injection.

A 35-year-old woman developed bilateral jugular thrombosis in the seventh gestational week in a twin pregnancy after severe ovarian hyperstimulation syndrome (OHSS) and intracytoplasmic sperm injection (ICSI). Due to progressive thrombosis and further complications despite anticoagulation therapy, the pregnancy was terminated in the ninth gestational week. Thromboembolic events are a serious complication associated with OHSS after assisted reproduction techniques. In these cases, a pregnancy can usually be protected by administering anticoagulation therapy, but our case shows that there may be exceptions to this. Screening for thrombophilia should be considered in patients who are at risk for OHSS and deep vein thrombosis.