What could be the reason for no fetal heartbeat detected during prenatal examination?

Patient's question:

Today at the hospital, the ultrasound results were as follows: Poor bladder filling, the patient reported being unable to continue holding her urine. The uterus is in an anterior position, and the uterine body is enlarged. A gestational sac measuring 3.82.0 cm is visible in the uterine cavity, in a normal position with a regular shape. Inside the gestational sac, a fetal pole measuring 1.10.9 cm is seen, but no fetal heartbeat is detected. What could this mean? The doctor said it is a miscarriage (more than two months pregnant), but I still can't accept it. Could you please help me understand this?

Doctor's answer:

In your case, it may be possible that the fetus has stopped developing, and the fetus has died in the uterine cavity. Common causes of fetal death include umbilical cord abnormalities, fetal malformations, and maternal diseases that lead to placental dysfunction and insufficient oxygen supply, resulting in fetal hypoxia and death. If the dead fetus remains in the uterus for too long, it can cause maternal coagulation dysfunction, leading to uncontrollable postpartum hemorrhage during delivery, which poses significant harm to the mother. Therefore, timely diagnosis and treatment are essential. It is recommended to induce abortion as early as possible to avoid causing maternal DIC.

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