[Heterotopic pregnancy during the second trimester is a severe complication of pregnancy].

Heterotopic pregnancy is a rare form of ectopic pregnancy in which one gestational sac is found in the uterus and another one in an extrauterine location. The spontaneous heterotopic pregnancy of our patient continued until the second trimester. In the 19th week of pregnancy, undiagnosed ectopic pregnancy in the left fallopian tube ruptured into the abdominal cavity, leading to a massive intra-abdominal hemorrhage. Left-side uterine appendages were excised in open surgery, but intrauterine pregnancy continued in vital form. Histologic examination revealed the excised tumor to be an ectopic pregnancy. The hypotension experienced by the patient led, however, to severe brain damage of the intrauterine fetus and induced abortion.