Birth Defects Related to Bendectin Use in Pregnancy

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Abstract
The risks of birth defects previously associated with Bendectin use in early pregnancy were evaluated in a case-control study of malformed infants whose mothers were interviewed in three regional centers; 98 infants with isolated cleft palate (CP), 221 with cleft lip with or without cleft palate (CL±CP), and 122 with selected heart defects (HD) were compared with 970 other malformed infants who served as controls. Relative risk estimates (with their 95% confidence limits) for first-trimester exposure to Bendectin were as follows; CP, 0.9 (0.5 to 1.5); CL±CP, 0.6 (0.4 to 0.8); and HD, 1.0 (0.6 to 1.6). Allowance for a large number of potentially confounding factors did not materially influence the risk estimates. These findings suggest that early in utero exposure to Bendectin does not appreciably increase the risk of oral clefts or selected cardiac defects. (JAMA1981;245:2311-2314)

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