Pregnancy complicated by ruptured endometrioma.

Pregnancy complicated by ovarian endometrioma is rare; only four cases have been reported. Although infertility and endometriosis are closely related, endometriosis may be found with pregnancy and, although it has been written that endometriosis will regress with pregnancy, occasionally complications may occur. This report illustrates such a complication with the rupture of an ovarian endometrioma.