Abstract
Placental weight, decidual surface area, mean thickness, and cord diameters were measured and compared in normal preterm, term, and intrauterine growth-retarded infants. Placental weight, decidual surface area and cord diameter were significantly smaller in the intrauterine growth–retarded infants as compared to those in the normal preterm and term infants. The infant weight to placental weight ratios in intrauterine growth–retarded infants were, however, normal for their gestational ages. Infant birth weight was related to placental decidual area in all groups and to placental weight only in the normal preterm and term infants. Placental weight varied directly with decidual area in all infants. There was no significant increase in placental area after the twenty-eighth week of gestation or in weight after the thirty-sixth week. These findings suggest that placental decidual area may be an important determinant of infant birth weight.
Published Version
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