1997. First trimester urine free beta hCG, beta core, and total oestriol in pregnancies affected by Down's syndrome: implications for (R)rst- trimester screening with nuchal translucency and serum free beta hCG. Prenat Diagn 17: 525±538....
We have studied maternal serum free beta-hCG and PAPP-A, and fetal nuchal translucency (NT) in a series of 46 cases of fetal Turner's syndrome, 13 cases of other sex chromosomal anomalies and compared these with 947 control pregnancies in the first trimester. In cases of Turner's syndrome...
First trimester screening for trisomy 21 by a combina- tion of maternal serum free b-hCG and pregnancy associated plasma protein A (PAPP-A) and fetal nuchal translucency thickness (NT) can identify about 90% of affected pregnancies for a 5% false positive rate (Spencer et al., 1999). Simi...
Maternal serum free β-hCG was measured at 10 to 14 weeks of gestation in 136 normal twin pregnancies and in 12 twin pregnancies where one or both fetuses had trisomy 21. The values were compared with a normal range from 4181 singleton pregnancies. In the normal twins the median free β-...
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Objective: To determine whether first-trimester measurements of maternal serum PAPP-A and free βhCG levels were associated with adverse pregnancy outcomes. Study Design: First trimester maternal serum free βhCG and PAPP-A were measured in 490 singleton pregnancies. Pregnancies were followed by the ...
A1235 Automatic Immunoassay System (PerkinElmer, Shelton, CT, USA) and a double labeling kit (AFP/free β-hCG) for the second trimester were used with washing liquid, quality control samples, and a range of standards (Wallac Oy, Turku, Finland). Blood samples and screening indicators Fasting...
The impact of fetal gender on first trimester nuchal translucency and maternal serum free beta-hCG and PAPP-A MoM in normal and trisomy 21 pregnancies. The impact of fetal gender on first trimester nuchal translucency and maternal serum free b-hCG and PAPP-A MoM in normal and trisomy 21 preg...
Maternal weight correction in the first trimester using free -hCG and PAPP-A can be best achieved using the log-linear procedure. Copyright ? 2003 John Wiley & Sons, Ltd.关键词: Down syndrome prenatal screening DOI: 10.1002/pd.708 被引量: 146 ...
trimester maternal serum free β-HCG level and preterm birth,fetal death,fetal chromosomal diseases and limb malformations;but there was a greatly negative correlation between over low second trimester maternal serum free β-HCG level and the incidence of fetal chromosomal diseases.Conclusions:Overhigh ...