What are the symptoms of a spontaneous miscarriage? Spontaneous miscarriage is a process where the embryo is lost from the mother's body. Before diagnosing a spontaneous miscarriage, it is first necessary to confirm an intrauterine pregnancy. After confirming the intrauterine pregnancy, symptoms include abdominal pain and heavy bleeding, which indicate a spontaneous miscarriage. The manifestations of a spontaneous miscarriage primarily include abdominal pain or bleeding, along with the expulsion of necrotic tissue-like material, which is the embryonic tissue. The symptoms are bleeding and abdominal pain. The symptoms of a spontaneous miscarriage are mainly distinguished from an ectopic pregnancy. An ectopic pregnancy can also present similarly, where an ultrasound fails to reveal a gestational sac, accompanied by abdominal pain and bleeding. Such scenarios should be considered for ectopic pregnancy, whereas abdominal pain and bleeding after confirming an intrauterine pregnancy indicates a spontaneous miscarriage.