Why is the fetus stopped

Fetal arrest refers to fetal development stops, from the B ultrasound, there will be no fetal heartbeat, more occurs in pregnancy 8 - 10 weeks. Fetal arrest is generally caused by intrauterine infection, chromosomal abnormalities, radiation, endocrine disorders and other reasons, will soon spontaneous abortion, patients can follow the doctor to take drugs to promote uterine contractions.