Another study published in the JAMA Open Network focused on how marijuana use during pregnancy could affect birth outcomes. Using data from Ontario, the study did report an raised likelihood of poor birth outcomes, including an increased risk of premature birth. While 7% of non-cannabis users suffered a risk of preterm birth, that number rose to 10% in cannabis users, a statistically significant difference.

However, most of the data and research behind marijuana use amidst pregnancy is spotty and incomplete. The truth is we really don’t know what effect, adverse or otherwise, could have on pregnancy. Until then, it’s best to consider taking a marijuana break while pregnant.

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