Establishing Modern Birth Weight Centiles for Twins in the United States

The authors aimed to develop updated birth weight percentiles for twins in the United States, using recent data to address inaccuracies in previous references. By applying quantile regression and the LMS method to five years of birth data, they created twin-specific and singleton birth weight curves, demonstrating improved classification of percentiles compared to existing references. Their findings suggest that the new twin reference offers a more accurate assessment of birth weight for twins, while the singleton reference can enhance studies involving both populations.