## Abstract **INTRODUCTION:** Congenital heart defects (CHDs) are the most common structural birth defects, yet their etiology is poorly understood. As there is heterogeneity within the group of CHDs, epidemiologic studies often focus on subgroups, of conditions, such as conotruncal heart defects (
✦ LIBER ✦
Descriptive epidemiology of nonsyndromic omphalocele in Texas, 1999–2004
✍ Scribed by A. Agopian; L. Marengo; L.E. Mitchell
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 84 KB
- Volume
- 149A
- Category
- Article
- ISSN
- 1552-4825
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## Abstract ## BACKGROUND Neural tube defects (NTDs) often result in fetal death or elective termination; therefore, not all cases are captured in typical hospital‐based surveillance. We examined sociodemographic differences among pregnancy outcomes to assess sources of bias in NTD surveillance an