Cannabis mothers

In the New York Times:

Children of women who use marijuana during or soon after pregnancy are twice as likely as other kids to become anxious, aggressive or hyperactive, according to a new study. The findings add weight to a growing body of evidence linking cannabis use during pregnancy to psychiatric problems in children. The behavioral issues may be driven in part by changes in the activity of genes found in the placenta, the organ that provides nutrients and oxygen to the growing fetus.

For pregnant women, cannabis isn’t just a means of getting high. Some women use it to ease severe morning sickness and anxiety, and they may not be aware that it can pose risks.

Women “tend to think smoking and drinking during pregnancy need to be avoided at all costs, but not cannabis,” said Yoko Nomura, a behavioral neuroscientist at Queens College, City University of New York, and a co-author of the new study. “We have a long way to go to educate pregnant women, policymakers and even OB-GYN doctors on this issue.”

Research suggests that a growing number of women are using cannabis during pregnancy: One study found that in 2016, nearly twice as many women in California reported using cannabis while pregnant than in 2009.

Yet for more than 40 years, research has been raising concerns about the effects of marijuana use during pregnancy. A longitudinal study that began in 1978 linked maternal cannabis use with children’s behavioral problems as well as deficits in language comprehension, visual perception, attention and memory. More recent research has linked cannabis use in pregnancy to low birth weight, reduced IQ, autism, delusional thoughts and attention problems, although some other studies have not identified such associations.

Of concern, too, is that cannabis today is nothing like the cannabis of years past. Levels of THC, the compound responsible for most of marijuana’s psychological effects, have increased significantly in recent years. “One joint today is like 17 joints in the 1970s,” said Dr. Darine El-Chaâr, a maternal-fetal medicine physician at The Ottawa Hospital in Canada who studies the health risks of marijuana use during pregnancy and was not involved in the new study.

That's quite some list of potential poor outcomes for the child!

I still suspect the US is going to regret the normalisation of marijuana use.