How do I rule out ectopic pregnancy?

Ectopic pregnancy generally refers to the sperm egg after combination, not in the uterus implantation, implantation in the fallopian tube or other parts, and development. This phenomenon may occur after abdominal pain, vaginal bleeding symptoms, and blood hcg is not obvious. If bleeding after pregnancy this symptom, you can consider ectopic pregnancy caused. Of course, the diagnosis is mainly B ultrasound examination.