Pot-use among the study subjects climbed from 4.2 percent to 7.1 percent from 2009 through 2016.
Some of the sharpest increases in marijuana usage were among pregnant women under the age of 18 and between the ages of 18 to 24 years old.
The Journal of the American Medical Association, known as JAMA, published on December 26, a research letter on data analysis that indicates cannabis use is increasing among pregnant women, and particularly for young mothers.
Despite the trends found in the report, the Centers for Disease Control and Prevention advises against using marijuana when pregnant, planing to become pregnant and breastfeeding, as tetrahydrocannabinol, or THC, can negatively affect a baby's development.
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More than half of all Americans reported having tried marijuana at some point in their lives, and about 22 percent of those qualify as regular users.
A new study reveals that more pregnant woman are turning to the use of marijuana.
Worryingly, if women are not reporting their marijuana use in their medical records, their doctors are unable to counsel them about the risks of using marijuana, or what alternative reliefs for symptoms like nausea might be available. As of January 1, recreational marijuana will be legal in the state for people over 21.