ONTD

AcronymDefinition
ONTDOh No They Didn't
ONTDOpen Neural Tube Defect
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References in periodicals archive ?
Increased second-trimester maternal serum a-fetoprotein (AFP) (3) is associated with fetal open neural tube defects (ONTD), other congenital anomalies, fetal and perinatal loss, low birth weight, and pregnancy complications [1, 2].
A cutoff of 2.0 multiples of the median (MoM) was used to define the patients at increased risk for a fetus with an ONTD and a mid-trimester risk of 1:270 was used as a cutoff to define high risk for Down syndrome.