What method should be used by a therapist to determine gestational age in a low birth weight infant?

The New Ballard Score is a widely recognized method for assessing gestational age in infants, particularly those who are low birth weight. This scoring system evaluates both physical and neurological characteristics of the infant, allowing healthcare professionals to estimate gestational age accurately. It takes into account various developmental milestones that are typically reached at certain gestational stages, making it a reliable tool for identifying the maturity of a newborn.

In the context of low birth weight infants, the New Ballard Score becomes crucial as these infants may have an increased risk for health issues related to their gestational age. By accurately determining gestational age using this method, healthcare providers can better assess the infant's needs, monitor their progress, and plan appropriate interventions.

Other methods mentioned may serve different purposes—such as the Apgar Score, which assesses the newborn’s immediate health following birth, or the Silversmith Score, which is not a standard tool for gestational assessment. Therefore, their application would not provide a precise evaluation of gestational age like the New Ballard Score does.