Clinical trial with a healthy group as comparator. The interventional group was made up of third-trimester mothers whose single fetuses had ductal constriction, excluding those exposed to NSAID, and the control group only by third-trimester normal fetuses. The interventional group was submitted to dietary orientation to restrict polyphenol-rich foods and both groups answered a food frequency questionnaire after fetal Doppler-echocardiographic examination and blood draw for PGE2 levels analysis. After two weeks, the women were again submitted to fetal echocardiogram, dietary assessment and blood draw.