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Comparison of newborn and placental weights between adolescent and adult women
Abstract
Objective. To compare placental and newborn weights between groups of adolescent (≤19 years old) and adult mothers (20 - 28 years old).
Methods. A prospective cross-sectional study was conducted with primiparous mothers who had their deliveries at ≥37 weeks’ gestation, and without maternal chronic disease or obstetrical intercurrence. Adolescents were divided into two groups (group A1, aged <15 years; group A2, 15 - 19 years), and the outcomes compared with a control group of adult mothers aged 20 - 28 years (group B). Group A1 included 23 newborns and 18 placentas, group A2 comprised 28 newborns and 28 placentas, and group B included 27 newborns and 27 placentas. The placental and newborn weights were compared between the groups using Student’s t-test for paired samples.
Results. The mean (standard deviation (SD)) weights of the newborns and placentas in group A were significantly lower than those in group B: 3167.8 g (359.6) v. 3404.0 g (136.8) (p=0.0016) and 573.7 g (98.7) v. 651.0 g (109.8) (p=0.0028), respectively. The mean (SD) newborn and placental weights in group A1 were significantly lower than those in group A2: 2996.0 g (373.7) v. 3309.0 g (273.6) (p=0.0012) and 513.0 g (94.9) v. 612.5 g (73.8) (p=0.0026), respectively.
Conclusion. The placental and newborn weights were significantly lower in the adolescent groups, and this difference was more pronounced in the younger of the adolescent groups.