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Pregnancy
Case Control Studies
Newborn Infant
Young Adult
Risk Factors
First Pregnancy Trimester
Retrospective Studies
Odds Ratio
Maternal Age
United States
Canada
Abnormalities, Drug-Induced
Neural Tube Defects
Prenatal Exposure Delayed Effects
Cleft Lip
Pregnancy Complications
Cleft Palate
Folic Acid
Smoking
Dietary Supplements
Co-Publications
66
25
15
12
7
5
4
3
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