Epidemiologic characteristics of neural tube defect (NTD) births occurring in Los Angeles
County, California, residents during the period 1966–1972 are presented. The prevalence at …

Epidemiologic studies of the neural tube defects (NTDs), anencephalus and spina bifida,
have for the most part been based on single sources of case ascertainment in past studies …

The prevalence and distribution of 991 cases of neural tube defects who were born in Utah
in 1940–1979 are analyzed. The average prevalence at birth is 1.00 per 1000 births (live …

The epidemiology of neural tube defects was reviewed, using data from two birth defects
surveiliance systems: the nationwide Birth Defects Monitoring Program and the Metropolitan …

This study presents race/ethnicity-specific prevalence estimates of neural tube defects
(NTDs) in California using 5 years of population-based data. NTD prevalence estimates …

Given the observed variation in birth prevalence and recurrence rates of neural tube defects,
it is important to obtain such data specific to a given locality for research and genetic …

This report considers several major epidemiologic aspects of neural tube defects (NTDs).
After examining briefly the approaches and goals of epidemiology the traditional …

The distribution and prevalence of births with neural tube defects in Utah from 1940 to 1979
are analyzed with regard to prevalence rates, secondary sex ratios, seasonality, yearly rates …

Records of almost 174,000 consecutive births at six Brooklyn hospitals during the years
1968–1976 were reviewed for congenital neural tube defects. Prevalence of anencephaly …

We previously reported that among neural tube defects (NTDs) with no known causes the
ones that occur alone (singles) have different epidemiologic characteristics from those that …