The percentage of pregnant women who reported using marijuana in the past month increased overall from 3.4% in 2002 to 7% in 2017. In the first trimester, past-month marijuana use increased from 5.7% to 12.1%.
More moms-to-be in the United States are using marijuana, especially in their first trimester, according to a study published Tuesday in the medical journal JAMA.
Pregnant women consistently reported more medical marijuana use in the first trimester than in the second or third trimesters.Researchers analyzed data from 4,400 pregnant women and 133,900 nonpregnant women between the ages of 12 and 44 who participated in the National Survey on Drug Use and Health.
The politics of pot are changing 02:30Daily or near daily marijuana use increased overall from 0.9% to 3.4%, with an increase of 1.8% to 5.3% in the first trimester, 0.6% to 2.5% in the second trimester and 0.5% to 2.5% in the third trimester. Pregnant women also reported using marijuana more days in 2017 than in 2002. The number of days of marijuana use increased on average from 0.4 to 1.1 overall, and 0.8 to 2 days during the first trimester.
Most birth defects occur in the first trimester of pregnancy, when the organs are forming, the CDC stated. That's why marijuana's effects on fetal growth could be"more pronounced in women who consume marijuana frequently, especially in first and second trimesters," according to the authors.
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