This is also important in the placenta, where fetal and maternal blood come within such close proximity.

Thus, the villi are part of the border between maternal and fetal blood during pregnancy.

Recent advances have allowed for less invasive testing methods based on the presence of fetal genetic material in maternal blood.

Eventually, the syncytiotrophoblasts come into contact with maternal blood and form chorionic villi.

The woman hasn't a drop of maternal blood in her body.

That proved too difficult because there are so few fetal cells in maternal blood.

In infants, the Apt test can be used to distinguish fetal hemoglobin from maternal blood.

As a result, fetal blood in the placenta is able to take oxygen from maternal blood.

Research was conducted to determine how women felt about noninvasive diagnosis of fetal aneuploid using maternal blood.