Embryo stops developing

Fetal abortion refers to the development of embryos in early pregnancy stopped for some reason. B-ultrasound examination showed intra-pregnancy sac or malformation of the fetus, no fetal heart beat, or withering of the gestational sac. Clinically, it belongs to the category of abortion or stillbirth. In the past, it was called expired abortion or missed abortion. There are many reasons why embryos stop developing.