Pregnancy after treatment
Cannabis use has been associated with lower sperm counts and altered ovulation, and Health Canada and SOGC advise avoiding it in pregnancy and while breastfeeding because THC crosses the placenta. Legality is not the same as safety in pregnancy.
Also known as: marijuana, THC, weed
Related Canada guides
Sources
- Society of Obstetricians and Gynaecologists of Canada (SOGC) patient information
- Public Health Agency of Canada
Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.