| Summary: | Para analizar el comportamiento de las medidas antropométricas a lo largo del embarazo en adolescentes y adultas, se evaluaron 81 embarazadas eutróficas, sanas, 14 adolescentes y 67 adultas, en el Centro de Atención Nutricional Infantil Antímano. Los criterios de inclusión antropométricos fueron, mínimo cinco evaluaciones antropométricas: una en el primer trimestre del embarazo, dos en el segundo y dos en el tercero. En cada una de las embarazadas se obtuvo el promedio trimestral de las variables antropométricas medidas en las consultas correspondientes al primero, segundo y tercer trimestre. Se obtuvieron los descriptivos de las variables del estudio. Se aplicó "t" de Student. Hubo cambios significativos a lo largo del embarazo en peso, circunferencias de: muñeca, cintura, abdomen, cintura-cadera, cadera-glúteo, muslo y pierna e índice de masa corporal en adolescentes y adultas. Se encontró cambios significativos a lo largo del embarazo en la talla acostada en adolescentes y en la circunferencia media del brazo en adultas. Hubo diferencia significativa en el cambio del primero al tercer trimestre del embarazo en la circunferencia de la pierna entre adolescentes y adultas. Las variables antropométricas estudiadas presentan el mismo comportamiento a lo largo de la gestación en adolescentes y adultas, excepto la circunferencia media del brazo<br>Changes of the anthropometric variables during gestation in well-nourished women. To analize the behavior of the anthropometric measures during gestation in teenagers and adults pregnant women. The study group was formed by 81 well nourished, healthy pregnant women, 14 teenagers and 67 adults. They were evaluated at Centro de Atención Nutricional Infantil "Antímano". The anthropometric criteria included at least five anthropometric evaluations: one in the first trimester of pregnancy, two in the second and two in the third. The anthropometric variable mean was obtained from each one of the pregnant women in each of their corresponding visits during the first, second and third trimester. The descriptive statistics of the studied anthropometric variables were calculated. Student’ t test was aplied. There were significant changes during pregnancy in weight, wrist, waist, abdomen, waist-hip, hip-gluteal, thigh and calf circumferences and body mass index in teenagers and adults. There were significant changes during gestation in a lyingdown position height in teenagers and mid-arm circumference in adults. There was significant diference in change from the first to the third trimester of gestation, between teenagers and adults in the calf circumference. The studied anthropometric variables presented the same behavior during gestation in adolescents and adults, unless the mid-upper arm circumference
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