The Globe and Mail reports in its Tuesday, June 26, edition that the Society of Obstetricians and Gynaecologists of Canada (SOGC), one of Canada's top medical organizations, is warning women about the risks marijuana poses if used during pregnancy and breastfeeding. The Globe's Carly Weeks writes that the SOGC says marijuana use can lead to preterm birth and low birth weight, as well as lower IQ and hyperactivity after a child is born. SOGC chief scientific officer Jocelynn Cook says: "We want to make sure women understand just because it's legal doesn't mean it's safe. The science does suggest there are effects on pregnancy and on fetal development." The organization is launching a social-media campaign aimed at women of childbearing age to inform them of the potential risks of cannabis use ahead of Oct. 17, the day the drug is scheduled to become legal in Canada. Despite the warnings, many women believe marijuana is safe, even in pregnancy, says Dr. Cook. A 2015 study published in the American Journal of Obstetrics and Gynecology found 70 per cent of women surveyed believe consuming cannabis once or twice a week during pregnancy poses no, or only slight, risks.