So, rather than making a statement on the lack of risks, this review of studies could be considered a call for future research to more carefully consider confounding factors. More specifically, researchers need to ensure they’re not just observing one socioeconomic group per study, and that their subject pools are not only large, but fully representative of the communities they come from.
In turn, we should take these studies with a grain of salt when they claim cannabis itself causes birth defects and other issues later on. On the other hand, though, it also means that other studies with these oversights need to be reconsidered as well.
All stoners take tolerance breaks, and the longer ones result in weed hitting you as hard as it did the first time you ever smoked. With that mindset, you’re no longer “quitting”, but instead saving it to fully enjoy after giving birth and breastfeeding.
More, and Better, Research Is Needed
If you consider other equally recent and valid studies, however, you could also argue there is insufficient evidence to claim cannabis use during pregnancy is wholly unsafe either. Researchers at NYC’s Columbia University, the New York State Psychiatric Institute, and Australia’s Swinburne University looked at 184 studies  dating up to December 2017, the combination of which describes 1,000+ subjects between 0 and 22 years of age.
Let’s be clear; up to this point, we’ve been referring to the use of THC-rich cannabis strains, as that’s what’s most popular these days. CBD oil, though, has been rapidly becoming more widely consumed. That, of course, is because it can’t get you high, has been observed to exhibit potential therapeutic effects, and is sold everywhere from gas stations to supermarkets.
Besides that, there’s no telling what’s in some CBD products these days. There’s CBD in there, sure, but many manufacturers aren’t careful about contaminants, leading to substances like bacteria and pesticides ending up in batches of oil and other products. Ingesting those, of course, would definitely lead to problems, whether it’s your fetus or breastfeeding child.
While some cannabis supporters will say there’s no connection between cannabis and pregnancy issues  , a study released in 2020 says otherwise. Researchers from around the UK observed over 5,000 pregnant women, dividing them into five groups: those who never used cannabis, those who only used it before pregnancy, those who stopped using it right before, those who used it but stopped before the 15-week mark, and those who used it after 15 weeks.
Yes. When you use marijuana during pregnancy, THC and other chemicals can pass through the placenta to your baby. The placenta grows in your uterus (womb) and supplies your baby with food and oxygen through the umbilical cord. Chemicals from marijuana also may pass to your baby’s brain.
Talk to your provider if you need help to quit using marijuana or any other street drug.
Using marijuana during pregnancy may cause problems for your baby before and after birth.
How does using marijuana affect breastfeeding?
No amount of marijuana has been proven safe to use during pregnancy.
Marijuana (also called pot, weed and cannabis) is a drug that comes from the dried leaves, flowers, stems and seeds of the cannabis plant. Marijuana is the most commonly used street drug during pregnancy.
Researchers are continuing to study the effects of marijuana use during pregnancy. Women who use marijuana may smoke cigarettes, drink alcohol or use other street drugs, making it hard to know exactly how marijuana affects pregnancy. Some studies suggest that if you use marijuana during pregnancy, your baby may have problems, including:
Medical marijuana (also called medicinal marijuana) is sometimes used to treat certain health conditions, like cancer or severe pain. In many states, medical marijuana is legal to use with a recommendation from your health care provider. It can be smoked, vaped or eaten. The Food and Drug Administration (also called FDA) has not approved marijuana as a safe and effective medicine for any health condition.