An ectopic pregnancy occurs when a fertilized egg implants outside the uterine cavity, with the fallopian tube accounting for approximately 95% of cases. Rupture of a tubal ectopic is a life-threatening emergency. Transvaginal ultrasound is the primary diagnostic tool. The key finding is a positive pregnancy test with an empty uterus and an adnexal mass. A live extrauterine embryo with cardiac activity is definitive but seen in fewer than 25% of cases. Free fluid in the cul-de-sac indicates hemorrhage and increases urgency.