Birthweight between 14 and 42 weeks' gestation

Area of Science:

• Obstetrics and Gynecology
• Neonatalogy
• Perinatal Medicine

Background:

• Accurate fetal growth monitoring is crucial for infant health.
• Previous fetal weight charts may not reflect current populations due to improved assessment techniques.
• Gestational age assessment accuracy has historically impacted fetal weight distribution analysis.

Purpose of the Study:

• To establish updated fetal weight gain curves for infants from 14 to 42 weeks' gestation.
• To evaluate the impact of advanced obstetric and pediatric assessment methods on fetal growth data.
• To determine the suitability of existing fetal weight charts for the Sheffield population.

Main Methods:

• Analysis of data from 57,866 livebirths in Sheffield (1976-1984).
• Inclusion of data from therapeutically terminated and spontaneously aborted fetuses during the same period.
• Comparison of current data with historical fetal weight distribution patterns.

Main Results:

• Preterm livebirths exhibit similar weight distributions to in-utero fetuses until the third trimester.
• The study's weight distribution patterns suggest enhanced accuracy in gestational age assessment.
• Mean fetal weights in this cohort differ significantly from the Gairdner and Pearson charts.

Conclusions:

• Updated fetal weight gain curves are necessary for accurate monitoring in the Sheffield population.
• Modern ultrasonography and pediatric assessment have improved the reliability of gestational age determination.
• Existing reference charts are deemed inappropriate for the studied population, necessitating localized data.