title: Combined first trimester screen or noninvasive prenatal testing or both.
authors: Raffles Women's Centre, Raffles Hospital, 585 North Bridge Road, Singapore 188770. drttan@gmail.com.
authors: Tony Yew Teck
authors: TY
authors: Tan
mesh_terms: D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood; D003362:Cost-Benefit Analysis; D004314:Down Syndrome / Q000097:blood / Q000175:diagnosis; D005189:False Positive Reactions; D005260:Female; D017048:Health Care Costs; D006801:Humans; D062145:Maternal Serum Screening Tests / Q000191:economics / Q000379:methods* / Q000592:standards; D011247:Pregnancy; D011261:Pregnancy Trimester, First / Q000097:blood*; D011266:Pregnancy-Associated Plasma Protein-A / Q000378:metabolism; D011295:Prenatal Care / Q000379:methods*; D011296:Prenatal Diagnosis / Q000191:economics / Q000379:methods* / Q000592:standards
chemical_list: D018997:Chorionic Gonadotropin, beta Subunit, Human; D011266:Pregnancy-Associated Plasma Protein-A; C579283:PAPPA protein, human
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