Study on the Correlation between the First Trimester Crown-Rump Length with Birth Weight

Abstract

Background: Fetal growth must be accurately monitored since aberrations raise the risk of low birth
weight (LBW), small for gestational age (SGA), and poor postpartum outcomes. The most accurate
indicator of gestational age and a good indicator of early growth trajectories is crown-rump length
(CRL), which is measured during the first trimester. Research indicates that while percentile-based
analysis enhances risk categorization, CRL below the 10th percentile predicts LBW, SGA, premature
birth, and NICU admission. Maternal age also affects fetal growth, although it's not known how it
affects the association between CRL and birth weight. The necessity for prospective studies to confirm
CRL as an early marker and improve prenatal surveillance is highlighted by the paucity of population-
specific data from India.