The main purpose of this legislation, known as the Maternal Access to Treatment Act of 2026, is to ensure that pregnant women in federal prison who are struggling with opioid addiction receive medication-assisted treatment (MAT). The goal is to address the serious health issues associated with opioid addiction during pregnancy, which can affect both the mother and the unborn child. The key provisions of this law require the Director of the Bureau of Prisons to provide MAT to all pregnant women in their custody who are addicted to opioids.