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Previous Volume 334:1195-1197 May 2, 1996 Number 18 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: The article by Rothman et al. (Nov. 23 issue)¹ followed our study, in which we identified a possible increase in the risk of certain birth defects associated with vitamin A supplementation, but information on dose was not available.² We are pleased that their study examined this relation according to the dose of retinol, but the methods used raise several questions.

Information on pregnancy outcomes was obtained from the delivering physician or the mother; both are considered poor sources of information on birth-defect diagnoses, but we cannot evaluate the accuracy of ascertainment without knowing the range and distribution . . . [Full Text of this Article]

References

This article has been cited by other articles:

• Azais-Braesco, V., Pascal, G. (2000). Vitamin A in pregnancy: requirements and safety limits. Am. J. Clin. Nutr. 71: 1325S-1333 [Abstract] [Full Text]  
• Smithells, D. (1996). Vitamins in early pregnancy. BMJ 313: 128-129 [Full Text]