What are the reasons that can cause a fetus not to have a fetal heartbeat?

Patient's question:

No

Doctor's answer:

Common causes of abnormal embryonic development include genetics, infection, immunity, exposure to radioactive substances or toxic chemical agents, drugs contraindicated for pregnant women, high temperatures, excessive stimulation, and so on. The embryo itself has defects or has stopped developing due to the influence of adverse factors during the developmental process.