Document Detail

Screening for chromosomal anomalies in the first trimester: a report on the first year of prospective screening for chromosomal anomalies in the first trimester in the Czech Republic.
MedLine Citation:
PMID:  17426792     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The increase in maternal age in recent years has intensified the effort to develop early non-invasive methods for screening for trisomy 21 and other chromosomal abnormalities in prenatal diagnosis. In the first trimester of pregnancy, maternal age, fetal nuchal translucency (NT), maternal levels of free beta- human chorionic gonadotropin (beta-hCG) and pregnancy-associated plasma protein-A (PAPP-A) are used as screening markers. We evaluated the introduction of this method of screening for the first time in the Czech Republic. METHODS: it is a prospective study for one-year from the beginning of 2004. The risk of trisomy 21(Down's syndrome) was estimated for 686 singleton pregnancies. The specific risk was calculated using the Fetal Medicine Foundation software (FMF) by accredited sonographers. Karyotyping was offered to women with risk >or= 1 in 250. RESULTS: In the population screened 18 % of women were aged 35 and more. We found 2 cases of trisomy 21 and 1 case of trisomy 18 (Edward syndrome) resulting in a detection rate of 100 % for trisomy 21 for a 5 % false positive rate (33 of 683). The maternal age of the detected cases was 30, 38 and 42 years. CONCLUSION: Introduction of the first trimester screening to our clinic, reduced the number of invasive genetic testing from 18 % to 5 %. First trimester screening for trisomy 21 and other aneuploidies has a high sensitivity with a low false positive rate and can be delivered in an efficient manner in a university hospital.
Ishraq Dhaifalah; Jiri Santavy; Jana Zapletalova
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biomedical papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia     Volume:  150     ISSN:  1213-8118     ISO Abbreviation:  Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub     Publication Date:  2006 Nov 
Date Detail:
Created Date:  2007-04-11     Completed Date:  2008-03-27     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  101140142     Medline TA:  Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub     Country:  Czech Republic    
Other Details:
Languages:  eng     Pagination:  275-8     Citation Subset:  IM    
Department of Medical Genetics and Fetal Medicine, Faculty of Medicine and Dentistry, Palacky University and University Hospital, Olomouc, Czech Republic.
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MeSH Terms
Chorionic Gonadotropin, beta Subunit, Human / analysis
Chromosome Disorders / diagnosis*
Genetic Testing*
Nuchal Translucency Measurement
Pregnancy Trimester, First*
Pregnancy-Associated Plasma Protein-A / analysis
Prenatal Diagnosis*
Sensitivity and Specificity
Reg. No./Substance:
0/Chorionic Gonadotropin, beta Subunit, Human; EC 3.4.24.-/Pregnancy-Associated Plasma Protein-A

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