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Pregnancy
Gestational Age
Prenatal Diagnosis
Genetic Testing
Mass Screening
Amniocentesis
alpha-Fetoproteins
Estriol
Chorionic Gonadotropin
Cotinine
Thyrotropin
Down's Syndrome
Fetal Diseases
Smith-Lemli-Opitz Syndrome
Second Pregnancy Trimester
First Pregnancy Trimester
Biological Markers
Maternal Age
False Positive Reactions
Maine
Co-Publications
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