The term adnexal torsion refers to when the stimulated
ovary twists on itself, cutting of its own blood supplies. Ovarian torsion
is a rare complication of IVF treatment. The overall risk is about 0.2%.
It is greater in the presence of OHSS. Ovarian torsion may cause severe
pain and tenderness in the lower abdomen.
If not treated early enough the twisted ovary may
die (gangrene). Treatment is surgery to untwist the ovary and even removing
it sometimes.
