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Undiagnosed case of term heterotopic pregnancy with ectopic abdominal pregnancy.

Heterotopic pregnancy involves coexisting intra-uterine and extra-uterine gestations. The incidence for natural uninduced pregnancy is 1 in 30,000 pregnancies. However the incidence is increasing with ovulation induction and artificial reproductive techniques. In more than 90% heterotopic pregnancies, the ectopic implantation is in the fallopian tube. A case of undiagnosed term heterotopic pregnancy in a 26-year-old primigravida is reported. She was referred from a practising obstetrician as a case of term twin pregnancy. Her regular antenatal records suggested intra-uterine growth restriction in one foetus of the twin. After confirmation of findings with ultrasound she was taken for emergency caesarean section. Heterotopic pregnancy was diagnosed on opening the abdomen. The term abdominal pregnancy was managed successfully. Although remained undiagnosed till term, good maternal and perinatal outcome was noted with survival of both the babies.