Fetal damage despite low-phenylalanine diet after conception in a phenylketonuric woman.
A woman with phenylketonuria gave birth to an infant with a cardiac defect and microcephaly despite introduction of a low-phenylalanine diet 5 weeks after conception (3 weeks after the first missed period). In maternal phenylketonuria fetal damage leading to reduced brain growth and cardiac malformations probably occurs within a few weeks of conception.
DOI: 10.1016/S0140-6736(79)90456-2
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