Smoking marijuana during pregnancy has been a debatable subject.
A study was published in the Journal of the American Medical Association last month, researching how marijuana use in pregnancy may affect birth outcomes, including prematurity.
The study used data from administrative records in Ontario from over 600,000 women, effectively all who had given birth in Ontario from 2012 through 2017.
Everyone’s data was collected in the same way and infant outcomes were measured objectively. Women had been asked about it at an early prenatal visit, and their answers were included in their official records. Use was self-reported.
The study had found some increased risk of poor birth outcomes among the cannabis users: most notably an increased risk of premature birth, an increased risk of the infant being small for his or her gestational age, and an increased risk of transfer to the NICU.