Strengths and Limitations
There are two existing systematic reviews on similar topics15, 19, each with fewer than 6 included studies. Our search strategy, including extensive hand-searching and citation list searching is a strength, yielding 23 included studies, only 4 of which overlap with studies included in these previous reviews. This study has a few limitations. We searched only for articles published in English. We only included studies with participants who had personal experience of pregnancy or breastfeeding, potentially excluding the important perspectives of cannabis users who have yet to become pregnant.