If screening indicates an increased risk for NTD, a detailed ultrasound examination ... Canada. The Prenatal Screening Program. Maternal Serum Markers of Fetal Abnormalities: Progress in Prenatal ...

But my first prenatal ... by ultrasound or amniocentesis. When blood drawn for the MSAFP test is also used to check levels of the hormones estriol and hCG, it's called a multiple-marker screening.

For a referral for a 20-week screening ultrasound during pregnancy contact your doctor or midwife. For more information about fetal ultrasounds visit the pregnancy and baby page at ...

After discussion between the pregnant woman and her physician, women with positive screens may be referred for genetic counseling, ultrasound ... Prenatal Screening Program. Maternal Serum Markers ...