[Article title missing]

Abstract

Pregnancy of unknown location (PUL) is a descriptive term, and while most cases of PUL are subsequently diagnosed with a spontaneous abortion or viable intrauterine pregnancy, 7% to 20% develop to ectopic pregnancy. The potential risk of ectopic pregnancy-related morbidity and mortality suggests that clinical attention should be paid to PUL assessment and treatment. We reviewed the latest research on PUL, including its classification, follow-up tools and treatment-related issues, in order to provide more references for clinicians.

Keywords

• |pregnancy, ectopic|pregnancy of unknown location|pregnancy|progesterone|chorionic gonadotropin|abortion|follow-up|treatment