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Terms in this set (59)

13-28 weeks
Quad Screen
o Second trimester prenatal screening may include several blood tests called multiple markers. AFP screening. Twins (more than one fetus is producing the protein)

o Estriol: This is a hormone produced by the placenta. It can be measured in maternal blood or urine to be used to determine fetal health.
o Inhibin: This is a hormone produced by the placenta.
o Human chorionic gonadotropin also a hormone produced by the placenta.

These markers provide information about your potential risk of having a baby with certain genetic conditions or birth defects. Screening is usually done by taking a sample of your blood between 15 and 20 weeks of pregnancy (16 to 18 weeks is ideal). The multiple markers include:
Also called maternal serum AFP, this blood test measures the level of AFP in your blood during pregnancy. AFP is a protein normally produced by the fetal liver that is present in the fluid surrounding the fetus (amniotic fluid). It crosses the placenta and enters your blood. Abnormal levels of AFP may indicate:
o A miscalculated due date, as the levels vary throughout pregnancy
o Defects in the abdominal wall of the fetus
o Down syndrome or other chromosomal abnormalities
o Open neural tube defects, such as spina bifida -Abnormal test results of AFP and other markers may mean that additional testing is needed. An ultrasound is used to confirm the milestones of your pregnancy and to check the fetal spine and other body parts for defects. An amniocentesis may be needed for an accurate diagnosis.

· Anatomical Fetal Survey (AFS)*: second Trimester ultrasound, identify cardiac and brain anomalies