[HTML][HTML] Association between maternal cannabis use and birth outcomes: an observational study
BMC pregnancy and childbirth, 2020•Springer
Background As cannabis consumption is increasing globally, including among pregnant
women, there is a critical need to understand the effects of cannabis on fetal development
and birth outcomes. We had two objectives: to determine 1) the factors associated with self-
reported cannabis use in the pre/early-pregnancy period, and 2) whether cannabis use is
associated with low birth weight, preterm birth, or small size for gestational age (GA) infants.
Methods Maternal questionnaire and birth outcome data was gathered from 2229 women …
women, there is a critical need to understand the effects of cannabis on fetal development
and birth outcomes. We had two objectives: to determine 1) the factors associated with self-
reported cannabis use in the pre/early-pregnancy period, and 2) whether cannabis use is
associated with low birth weight, preterm birth, or small size for gestational age (GA) infants.
Methods Maternal questionnaire and birth outcome data was gathered from 2229 women …
Background
As cannabis consumption is increasing globally, including among pregnant women, there is a critical need to understand the effects of cannabis on fetal development and birth outcomes. We had two objectives: to determine 1) the factors associated with self-reported cannabis use in the pre/early-pregnancy period, and 2) whether cannabis use is associated with low birth weight, preterm birth, or small size for gestational age (GA) infants.
Methods
Maternal questionnaire and birth outcome data was gathered from 2229 women and 1778 singleton infants in the Ontario Birth Study, a hospital-based prospective cohort study (2013–2019). Women self-reported cannabis use within 3 months of learning their pregnancy status. Multivariable linear and logistic regression was conducted to 1) identify factors associated with cannabis use, and 2) determine the associations between cannabis use with the selected birth outcomes.
Results
Cannabis use increased in the cohort over time. Women who reported cannabis use (N = 216) were more likely to be younger and more likely to use alcohol, tobacco, and prescription pain medication, although most did not. These women had infants born at lower average birth weights and had 2.0 times the odds of being small for GA (95% confidence interval: 1.3, 3.3) after multivariable adjustment for socioeconomic factors and other substance use.
Conclusion
Our results suggest that women who use cannabis around the time of conception have higher odds of having infants that are small for gestational age. Targeted clinical messaging may be most applicable to women actively trying to conceive.
Springer
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