RecruitingBehavioural interventionExpectant Moms Managing Attention-Deficit/ Hyperactivity DisorderThe goal of this study is to test a behavioral program for pregnant individuals with ADHD. This behavioral program focuses on skills for managing ADHD and related symptoms in pregnancy and postpartum. This pilot effectiveness-implementation trial aims to (1) preliminarily evaluate the MomMA behavioral intervention compared to treatment as usual (TAU) on clinical outcomes and (2) evaluate implementation outcomes, including feasibility and acceptability of clinic screening within existing OB workflows; assessment and intervention protocols; provider training/fidelity to manual; and all other study protocols from the perspective of real-world providers and participants.