The association of preconception and prenatal cannabis and tobacco exposure with autism symptoms in offspring: A population-based longitudinal study.

BackgroundFetal exposure to cannabis and tobacco during pregnancy leads to adverse fetal and childhood outcomes. We hypothesized that fetal exposure to cannabis and tobacco have persistent programming effects on hypothalamic pituitary adrenal (HPA) axis functioning in childhood. Therefore, we examined the associations of parental cannabis and tobacco use during pregnancy with childhood hair cortisol and cortisone concentrations at 6 years, as biomarkers of long-term HPA-axis functioning. MethodIn a population-based prospective birth cohort among 2577 mothers and their children, information of parental cannabis and tobacco use was collected by questionnaires, and maternal urine samples were additionally analyzed to detect cannabis metabolite concentrations. Cortisol and cortisone were measured in hair samples at 6 years. Linear regression analysis with adjustment for several confounders was used to test our hypothesis. ResultsAs compared to non-exposed children, offspring exposed to cannabis during pregnancy (in combination with tobacco) had higher childhood cortisol concentrations (log-10 transformed difference 0.16, 95 % Confidence Interval 0.04 to 0.28). This association was not mediated by birth weight. No differences in cortisone concentrations among cannabis-exposed children were observed. Maternal tobacco use during pregnancy was not associated with childhood cortisol or cortisone concentrations. Further, paternal cannabis or tobacco use was not associated with childhood cortisol or cortisone concentrations. ConclusionsOur findings suggest that maternal cannabis use, combined with tobacco, during pregnancy is associated with alterations in offspring HPA-axis functioning. Further studies need to replicate these findings, and assess the causality and long-term consequences of these associations.

Studies of the long-term consequences of maternal cannabis use on child development beyond the neonatal period are sparse. In the current study, we use a multi-information approach to assess the association of prenatal cannabis exposure and child behavioural and emotional functioning. To explore the possible causal nature of the association, we investigated whether maternal tobacco and paternal cannabis use during pregnancy were also associated with child problems. The study population included children of a population-based birth cohort in The Netherlands (n = 5903). Information on parental cannabis use was collected using questionnaires; urine of mothers was analysed for the presence of cannabis metabolites. Child behavioural and emotional problems at approximately 7-10 years were measured using validated teacher-, child- and mother-reports. Our findings show associations of maternal cannabis use during pregnancy with offspring externalising problems (B = 0.53; 95% CI: 0.29-0.77), but not with internalising problems (B = -0.10; 95% CI: -0.31-0.11). However, maternal cannabis use before pregnancy was also associated with offspring externalising problems (B = 0.27; 95% CI: 0.02-0.52). Further, cannabis use by the father was associated with child externalising problems (B = 0.36; 95% CI: 0.22-0.49) but not internalising problems. Prenatal exposure to maternal cannabis use is specifically associated with offspring behavioural problems, but not emotional problems. This association is probably not due to an effect of intrauterine cannabis exposure on fetal development, because both maternal and paternal cannabis exposure during pregnancy were related to offspring externalising problems. Our findings suggest that the association can be explained through residual confounding, most likely through shared genetic vulnerabilities for parental cannabis use and offspring behavioural problems.

Intrauterine cannabis exposure leads to more aggressive behavior and attention problems in 18-month-old girls

Causal effects of cannabis legalization on parents, parenting, and children: A systematic review

Maternal and paternal cannabis use during pregnancy and the risk of psychotic-like experiences in the offspring

The role of general parenting and cannabis-specific parenting practices in adolescent cannabis and other illicit drug use

There is increasing evidence that the life-course origins of health and development begin before conception. We examined associations between timing and frequency of preconception cannabis and tobacco use and next generation preterm birth (PTB), low birth weight (LBW) and small for gestational age. 665 participants in a general population cohort were repeatedly assessed on tobacco and cannabis use between ages 14–29 years, before pregnancy. Associations were estimated using logistic regression. Preconception parent (either maternal or paternal) daily cannabis use age 15–17 was associated with sixfold increases in the odds of offspring PTB (aOR 6.65, 95% CI 1.92, 23.09), and offspring LBW (aOR 5.84, 95% CI 1.70–20.08), after adjusting for baseline sociodemographic factors, parent sex, offspring sex, family socioeconomic status, parent mental health at baseline, and concurrent tobacco use. There was little evidence of associations with preconception parental cannabis use at other ages or preconception parental tobacco use. Findings support the hypothesis that the early life origins of growth begin before conception and provide a compelling rationale for prevention of frequent use during adolescence. This is pertinent given liberalisation of cannabis policy.

Prenatal exposure to tobacco and cannabis, early cannabis initiation, and daily dual use of combustible cigarettes and cannabis during young adulthood

Prenatal Cannabis and Tobacco Exposure in Relation to Brain Morphology: A Prospective Neuroimaging Study in Young Children

Parental cannabis use disorder (CUD) and low positive parenting (monitoring, support, and consistency) are risk factors for adolescent cannabis use. However, it is unclear whether parental cannabis use without CUD is sufficient to increase risk for low positive parenting and adolescent cannabis use. Additionally, parents may not treat each of their adolescents the same, and risk for adolescent cannabis use may increase as a result of low levels of positive parenting in families or low positive parenting unique to each adolescent. The current study prospectively tested low positive parenting as a mediator of the relation between parental cannabis use history (with parental cannabis use and CUD considered separately) and adolescent cannabis use at the family level and individual level. Participants were 363 adolescents from a multigenerational longitudinal study who reported on positive parenting when they were ages 9-16 (M = 11.6, SD = 1.40) and on cannabis use when they were ages 13-19 (M = 16.3, SD = 1.84). Parents reported on their own cannabis use and CUD. Results showed that parental CUD was associated with adolescent cannabis use (OR = 3.62, p = .047) but parental cannabis use without CUD was not, and only parental CUD predicted low positive parenting (B = -0.28, p < .05). Average levels of low positive parenting within a family partially mediated the association between parental CUD and offspring cannabis use. These findings suggest parental cannabis use alone may not impair parenting, but parental use that meets criteria for CUD does impair parenting. Additionally, average levels of positive parenting in families may be a mechanism underlying the intergenerational transmission of cannabis use. (PsycINFO Database Record

Perspectives of adolescents and young adults on cannabis use during pregnancy

Cannabis use and cancer.

Introduction: Cannabis use in the United States is increasingly accepted and legal. Rise in use among childbearing aged adults is potentially concerning, as the impacts of parental cannabis use on children are largely unknown, especially for young children. This study examined whether cannabis use is associated with increased risk for negative parenting and child emotional and behavioral problems among the parents of young children. Methods: We conducted a cross-sectional survey of parents and child behavior, recruited through five primary care practices in three states. Parents of children aged 1.5–5 years reported on family demographics, last 6-months cannabis use, negative parenting, parent mental health, parents’ adverse childhood experiences (ACEs), and child emotional/behavioral problems. We conducted hierarchical regressions to determine if parental cannabis use predicts negative parenting and/or child emotional/behavioral problems when controlling for other risk factors. Results: Of 266 responding parents, 34 (13%) reported cannabis use in the last 6 months. Parents who endorsed cannabis use reported significantly more negative parenting, ACEs, anxiety, depression, and child emotional/behavioral problems. Adjusting for the effects of other risk factors, cannabis use significantly predicted more negative parenting, but was not uniquely and significantly associated with child emotional/behavioral problems. Conclusion: Parental cannabis predicted negative parenting, which in turn predicted early childhood emotional/behavioral problems; however, parental cannabis use did not predict child emotional/behavioral problems when other risk factors were considered. Further research is needed to elucidate the nature and direction of relationships between parent cannabis use, negative parenting, child psychological outcomes, and other risk factors.

The construction of parents' cannabis use in the context of child protection has far‐reaching implications for how their parenting is perceived and assessed and for the decisions made regarding their children's lives. Yet little is known about the meanings various stakeholders in child protection processes attribute to parents' cannabis use. This paper aims to explore constructions of parents' cannabis use in child protection court proceedings and position them within a political and social context. A qualitative data mining method was used to examine 32 Family Court judgements in care proceedings that involved parents using cannabis in England and Wales. The analysis of the judgements revealed that most portrayed parents' cannabis use as a negative, deviant and harmful activity. Three constructions of cannabis use were identified: cannabis use as a risk to children, cannabis use as proof of parents' deficits, and cannabis use as (responsible) self‐medication. The discussion considers the findings in light of two social and political processes that underpin child protection policy and practice: the adoption of a risk perspective and the manifestation of othering processes. Implications for policy and practice highlight the importance of developing a critical framework for responding to parental cannabis use.

Cannabis legalization has triggered an increase in prenatal cannabis use. Given that tobacco is commonly co-used with cannabis, determining outcomes associated with prenatal cannabis and tobacco co-exposure is crucial. While literature exists regarding the individual effects of prenatal cannabis and tobacco exposure on childhood behaviour, there is a gap regarding their combined use, which may have interactive effects. Therefore, we investigated whether prenatal cannabis and tobacco co-exposure was associated with greater externalizing and internalizing problems in middle childhood compared to prenatal exposure to either substance alone or no exposure. Baseline data from the Adolescent Brain Cognitive Development (ABCD) Study (collected in children ages 9-11) were used to explore differences in externalizing and internalizing scores derived from the Childhood Behavior Checklist across four groups: children with prenatal cannabis and tobacco co-exposure (CT, n = 290), children with prenatal cannabis-only exposure (CAN, n = 225), children with prenatal tobacco-only exposure (TOB, n = 966), and unexposed children (CTL, n = 8,311). We also examined if the daily quantity of tobacco exposure modulated the effect of cannabis exposure on outcomes. Adjusting for covariates, a 2 × 2 ANCOVA revealed significant main effects for prenatal cannabis (p = 0.03) and tobacco exposure (p < 0.001), and a significant interaction effect on externalizing scores (p = 0.032); no significant main effects or interactions were found for internalizing scores. However, interactions between daily quantity of cannabis and tobacco exposure significantly predicted both externalizing and internalizing scores (p < 0.01). These findings indicate that co-exposure is associated with greater externalizing problems than exposure to either substance alone, which did not differ from each other. Further, greater tobacco exposure may amplify the negative effect of cannabis exposure on both externalizing and internalizing behaviours in children. These findings underscore the need for interventions that target cannabis and tobacco co-use in pregnant women to circumvent their adverse impact on middle childhood behaviour. Prenatal Cannabis and Tobacco Co-exposure and its Association with Middle Childhood Behaviours.