What does it mean if there is no fetal heartbeat detected at 10 weeks of pregnancy and a miscarriage occurs?

A miscarriage at ten weeks of pregnancy without a fetal heartbeat typically indicates that the embryo has ceased development, medically termed an inevitable abortion. The causes of this condition can vary, and mainly include: 1. **Abnormal embryonic development**: Such as chromosomal abnormalities, which are one of the primary causes of early miscarriage, accounting for approximately 50%-60%. Embryonic developmental abnormalities may represent a natural process of elimination. 2. **Maternal factors**: Such as thyroid dysfunction (hyperthyroidism or hypothyroidism), autoimmune diseases (e.g., antiphospholipid syndrome), systemic diseases, uterine developmental abnormalities, or gynecological inflammation, all of which may affect normal embryonic development. 3. **Other factors**: Such as viral infections, inadequate luteal function, or excessive physical strain, which may also lead to miscarriage. Once embryonic demise is diagnosed, a miscarriage procedure should be performed as soon as possible to avoid greater harm to the mother, such as severe bleeding or intrauterine infection.