SciELO - Scientific Electronic Library Online

vol.16 issue4Capture-recapture methodology: an option for surveillance of non-communicable diseases in the elderlyLevel of physical activity in adolescents from Niterói, Rio de Janeiro, Brazil author indexsubject indexarticles search
Home Page  

Services on Demand




Related links


Cadernos de Saúde Pública

On-line version ISSN 1678-4464Print version ISSN 0102-311X


CECATTI, José Guilherme; MACHADO, Maria Regina Marrocos; SANTOS, Fernanda Fioravanti Azank dos  and  MARUSSI, Emílio Francisco. Curve of normal estimated fetal weight values by ultrasound according to gestation age. Cad. Saúde Pública [online]. 2000, vol.16, n.4, pp.1083-1090. ISSN 1678-4464.

OBJECTIVE: to evaluate the evolution of estimated fetal weight in normal pregnancies in Campinas, Brazil, between 20 to 42 weeks. DESIGN AND METHODS: A descriptive study was performed, including 2,874 normal pregnant women studied through routine obstetric ultrasound with fetal biometry, using the Hadlock (1991) formula for fetal weight estimation. Data were evaluated by fitting a curve with the 10th, 50th, and 90th percentiles of fetal weight for gestational age, subsequently submitted to a smoothing procedure by quadratic polynomial adjustment. RESULTS: the 50th percentile was 368g at 20th week, 1,512g at 30th, and 3,417g at 42nd week. There was a mean weight increase of 200g per week from the 27th to 38th week, when the gain decreased. CONCLUSIONS: The availability of a Brazilian curve of normal estimated fetal weight will allow for prenatal ultrasound diagnosis of deviations.

Keywords : Fetal Weight; Gestational Age; Fetal Growth Retardation; Prenatal Ultrasonography.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )