Hysteroscopy in the diagnosis of suspected interstitial pregnancy

Three cases are reported in which interstitial pregnancy was suspected on ultrasound scan. The first was managed by scans and laparoscopy, but resulted in rupture of the uterus and hysterectomy at 20 weeks. In the following cases hysteroscopy was used to refute the diagnosis in one patient and confirm it in another within the first trimester. A case is made for the use of hysteroscopy in the assessment of patients with suspected interstitial pregnancy.