The symptoms of an ectopic pregnancy depend on the location of the implantation of the fertilized egg, whether there has been a rupture or miscarriage, and the amount and duration of bleeding if there has been a rupture or miscarriage. Generally, there may be no symptoms in the early stages. If a miscarriage or rupture occurs, symptoms similar to those of threatened miscarriage or early pregnancy might appear. Typically, the manifestations of ectopic pregnancy include missed periods, usually about six to eight weeks of amenorrhea. The second is abdominal pain, which is the most common symptom in patients with tubal pregnancies, accounting for about 95%. Third, there is a small amount of vaginal bleeding, which does not correlate proportionally with internal bleeding and is generally less than a normal menstrual period. Fourth, fainting and shock can occur if there is significant internal bleeding. Fifth, a mass may be palpable in the abdomen.