J Obstet Gynaecol Can. 2022 May 5:S1701-2163(22)00329-2. doi: 10.1016/j.jogc.2022.03.014. Online ahead of print.
We compared levels of cannabis and other substance use before and after the legalization of cannabis in the obstetric population of the Kingston General Hospital (KGH). Urine samples were collected from patients admitted to KGH labour and delivery in September/October 2018 and September/October 2019. Urine was anonymously screened for cannabis and other substances. Approximately 9.5%-10% of patients screened positive for cannabis. We found no difference in the prevalence of cannabis use in our sample after legalization. Health care providers should discuss cannabis with patients who are pregnant or planning a pregnancy.
Source: ncbi 2