The chorion lies closest to the placenta. The chorionic sac encompasses the fetus and the amnion and is covered with chorionic villi until the 8th week. After the 8th week, these villi are ...

If the development of blood vessels in the placenta is impaired, fetal growth retardation may result. Scientists from the German Cancer Research Center (DKFZ) and the Mannheim Medical Faculty of ...

Chorionic villus sampling ... Because the placenta is derived from the extraembryonic portion of the early embryo, the villus cells in the placenta have the same genetic composition as the ...

In this procedure, a small sample of placental tissue (chorionic villi) was collected and sent for genetic testing. This prenatal test helps detect potential genetic disorders in the baby.

"We know the fetus's sex can impact a mother's risk for conditions such as preeclampsia, hyperemesis, and gestational ...