Overview
An ectopic pregnancy occurs when a fertilised ovum implants outside the normal uterine cavity. It is a common cause of morbidity and occasionally of mortality in women of reproductive age. The aetiology of ectopic pregnancy remains uncertain although a number of risk factors have been identified. Its diagnosis can be difficult. In current practice, in developed countries, diagnosis relies on a combination of ultrasound scanning and serial serum beta-human chorionic gonadotrophin (β-hCG) measurements. Ectopic pregnancy is one of the few medical conditions that can be managed expectantly, medically or surgically.