The AAFP recommends that all women planning or capable of pregnancy take a daily supplement containing 0.43 to 0.8 mg (400 to 800 µg) of folic acid. (2009)
These recommendations are provided only as assistance for physicians making clinical decisions regarding the care of their patients. As such, they cannot substitute for the individual judgment brought to each clinical situation by the patient's family physician. As with all clinical reference resources, they reflect the best understanding of the science of medicine at the time of publication, but they should be used with the clear understanding that continued research may result in new knowledge and recommendations. These recommendations are only one element in the complex process of improving the health of America. To be effective, the recommendations must be implemented.
View the criteria for AAFP clinical preventive services recommendations and grading.
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Neural Tube Defects - Clinical Preventive Service Recommendation