The chances of fetal heartbeat returning after 12 weeks of fetal arrest are generally unlikely.
Clinically, if fetal arrest has been detected, it means that the fetus has stopped developing at this point, so the chances of the heart returning at a later stage are basically none. Under normal circumstances, the error of ultrasound examination is relatively small, and this situation does not usually occur.
At 12 weeks of pregnancy, the fetus has gradually stabilized and basically will not stop developing, but a small number of fetuses may stop developing, which is mainly related to the mother’s factors, the fetus’s own factors and other factors.
If the fetus has already stopped developing, it is necessary to consult a doctor in time for examination and, if necessary, to carry out a timely removal operation to avoid intrauterine infection and other situations.