Naturally occurring heterotopic pregnancy in a multiparous patient: a case report.

Background: Heterotopic pregnancy, or simultaneous intrauterine and extrauterine pregnancy, occurs rarely. Consequently, clinicians might not always consider a diagnosis of heterotopic pregnancy. Transvaginal ultrasound or other imaging modalities cannot be completely relied upon to exclude heterotopic pregnancy from the differential diagnosis of pregnant patients with abdominal pain.

Retained fetal bones masquerading as an intrauterine device with missing threads.

We present the case of a 26-year-old woman with retained fetal bones, discovered eight years after an induced mid-trimester abortion in a West African country. The patient had requested her general practitioner to change the intrauterine device (IUD) which she assumed had been inserted immediately post-abortion. No threads were seen on vaginal examination.