Double test is a genetic screening test for the fetus based on the mother's blood sample in early pregnancy. Whether or not to perform the Double test requires fasting is currently a concern of many pregnant women.

Double test prenatal screening test is used to screen for some genetic syndromes in the fetus. Knowing how to read the Double test results correctly will help parents better understand the health status of the fetus.

Screening for fetal abnormalities is something pregnant mothers are extremely concerned about, in which the Double test prenatal screening test is recommended to be performed regularly to ensure that the baby is born smart and healthy.