MethadoneMothersNarcoticsOpiate Substitution TreatmentOpioid-Related DisordersHeroin DependenceMethadyl AcetateBuprenorphineAnalgesics, OpioidNeonatal Abstinence SyndromeHeroinPregnancySubstance Abuse DetectionInfant, NewbornMother-Child RelationsPyrrolidinesDrug OverdoseSubstance-Related DisordersMorphineMaternal-Fetal ExchangeSubstance Abuse, IntravenousDextropropoxypheneStreet DrugsNarcotic AntagonistsSubstance Withdrawal SyndromeBreast FeedingCocaine-Related DisordersPregnancy ComplicationsOpiumMeconiumOxidoreductases, N-DemethylatingStereoisomerismNaloxoneTherapeutic CommunityPrenatal Exposure Delayed EffectsPrisonersDirectly Observed TherapyDrug InteractionsDose-Response Relationship, DrugInfectious Disease Transmission, VerticalCodeineFathersNaltrexone