Effect of gestational age on first trimester maternal serum prenatal screening correction factors for ethnicity and IVF conception

被引：15
作者：
Cowans, Nicholas J. [1 ]
Spencer, Kevin [1 ]
机构：
[1] King George Hosp, Dept Clin Biochem, Prenatal Res Unit, Goodmayes, England
来源：
PRENATAL DIAGNOSIS | 2013年 / 33卷 / 01期
关键词：
PLASMA PROTEIN-A; NUCHAL TRANSLUCENCY THICKNESS; HUMAN CHORIONIC-GONADOTROPIN; CHROMOSOMAL-ANOMALIES; TRISOMY-21; PREGNANCY; 1ST-TRIMESTER; IMPACT;
D O I：
10.1002/pd.4010
中图分类号：
Q3 [遗传学];
学科分类号：
071007 ; 090102 ;
摘要：
Objective The aim of this study is to investigate gestational age effects of maternal ethnicity and in vitro fertilization (IVF) pregnancy correction factors of first trimester trisomy 21 screening markers pregnancy associated plasma protein A (PAPP-A) and free-beta human chorionic gonadotropin (free hCG beta) in a large dataset. Methods Data from 205?341 normal singleton pregnancies were retrieved, and PAPP-A and free hCG beta concentrations were converted to multiples of the medians (MoMs) uncorrected for either maternal ethnicity or IVF pregnancy. Log10 transformed MoMs were plotted against gestational age in each group to examine gestational age effects Results Significant gestational age effects were found for correction factors for PAPP-A in Afro-Caribbean, South Asian and East Asian, and for free hCG beta in Afro-Caribbean and IVF pregnancy. Conclusions Current single correction factors for PAPP-A and free hCG beta based on maternal ethnicity and IVF pregnancy are inappropriate, and future screening algorithms need to take into account the change in effect of these factors with gestational age. (c) 2012 John Wiley & Sons, Ltd.
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页码：56 / 60
页数：5
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