North American Registry of Midwives (NARM) 2026 – 400 Free Practice Questions to Pass the Exam

The New Ballard Scale (NBS) is a clinical tool used to estimate the gestational age of newborns. It utilizes a combination of physical and neuromuscular criteria to assess maturity. This scale becomes reliable at around 20 weeks of gestation, as it correlates well with the development that is typically seen by this gestational age.

Prior to 20 weeks, the development of physical features and neuromuscular function is generally insufficient to provide an accurate assessment, leading to potential inaccuracies in determining gestational age. After 20 weeks, the characteristics that the NBS evaluates become more pronounced and consistent, allowing healthcare providers to make more accurate assessments of gestational age. This accuracy is critical in providing appropriate care and interventions for newborns based on their developmental stage.