Amniotic band syndrome

The amniotic membrane ruptures during the early and middle pregnancy, and the amniotic fluid flows out of the amniotic sac, causing part or all of the amniotic membrane to retract, forming a banded amniotic membrane; due to the restriction of the amniotic membrane band, the fetus protruding into the extraembryonic cavity, the fetal body is adhered, damaged, and formed Various deformities are called amniotic band syndrome.