Saturday, April 11, 2009

Methods of prenatal diagnosis

Maternal serum screening
Estimation of maternal serum fetoprotein (AFP)
concentration in the second trimester is valuable in screening
for neural tube defects. A raised AFP level indicates the need
for further investigation by amniocentesis or ultrasound
scanning. In some centres amniocentesis has been replaced
largely by high resolution ultrasound scanning, which detects
over 95% of affected fetuses.

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