gynecology and obstetrics
Noninvasive Prenatal Fetal Screening Tests
Screening in multiple gestations
All forms of screening in singleton pregnancies are available to patients with a twin pregnancy. For twin pregnancies, screening performance using traditional methods ( Maternal serum screening for neural tube defects , quad) has lower sensitivity and specificity than in singleton pregnancies. No serum screening or cfDNA screening protocols are validated for triplet or higher-order pregnancies. 