Diagnosis is usually made through an [ultrasound]() scan. In a typical early pregnancy ultrasound, a gestational sac and an embryo with a heartbeat are visible. However, in an anembryonic pregnancy, the gestational sac is present but empty, meaning no embryo is detected. Blood tests measuring [hCG (human chorionic gonadotropin)]() levels may also be used; in anembryonic pregnancy, hCG levels may rise but not as expected.
