TY - GEN AU - Barkai,G AU - Goldman,B AU - Ries,L AU - Chaki,R AU - Cuckle,H TI - Effect of gravidity on maternal serum markers for Down's syndrome SN - 0197-3851 PY - 1996///1022 KW - Adult KW - Aged KW - Analysis of Variance KW - Biomarkers KW - blood KW - Chorionic Gonadotropin KW - Down Syndrome KW - Estriol KW - Female KW - Fetal Death KW - Gestational Age KW - Humans KW - Mass Screening KW - Maternal Age KW - Middle Aged KW - Parity KW - Predictive Value of Tests KW - Pregnancy KW - Prenatal Diagnosis KW - methods KW - Prospective Studies KW - alpha-Fetoproteins KW - analysis N1 - Publication Type: Journal Article UR - https://doi.org/10.1002/(SICI)1097-0223(199604)16:4<319::AID-PD859>3.0.CO;2-U ER -