Does co-location of medication assisted treatment and prenatal care for women with opioid use disorder increase pregnancy planning, length of interpregnancy interval, and postpartum contraceptive uptake?

•Women on MAT have high rates of unplanned pregnancy and short interpregnancy intervals regardless of where they receive MAT care•Contraceptive uptake is low for postpartum women with opioid use disorders even when their prenatal care and MAT care is co-located•Integration of substance use treatment and prenatal care may improve other outcomes that were not examined in this study