This notice announces the opportunity to apply for funding under the Maternal and Child Health (MCH) Research Network on Promoting Healthy Weight (HW-RN) among Children with Autism Spectrum Disorder (ASD) and other Developmental Disabilities (DD) program. For this competition, the target population of interest is broadened from the previous MCH HW-RN competition to include both overweight/obese and underweight children, and an increased emphasis on the inclusion of underserved populations in the proposed research studies