First-trimester diagnosis of cesarean scar ectopic pregnancy

Elysia Moschos, Sreedevi Sreenarasimhaiah, Diane M. Twickler

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Once considered extremely rare, implantation of a pregnancy within the scar of a previous cesarean section is becoming more common. In fact, its incidence is now higher than that of cervical ectopic pregnancies. We identified 5 cases of ectopic pregnancy implanted in a prior cesarean section scar at our institution since 2004. We outline the criteria for the first-trimester sonographic diagnosis of cesarean scar ectopic pregnancy, including a new sign of lower uterine segment ballooning, which has previously not been reported. Clinicians must have a heightened awareness of this serious and potentially fatal pregnancy complication.

Original languageEnglish (US)
Pages (from-to)504-511
Number of pages8
JournalJournal of Clinical Ultrasound
Issue number8
StatePublished - Oct 1 2008


  • Cesarean section
  • Ectopic pregnancy
  • Sonography

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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