Everyone knows you shouldn’t drink alcohol while pregnant, but what about using marijuana? An analysis of urine samples from about 300,000 California women finds that more than seven percent used marijuana while pregnant. Also, rates of pot use during pregnancy have steadily risen over the years, from 4.2 percent in 2009 to 7.1 percent just seven years later. Kaiser Permanente Northern California, a major regional health care group, ran the analysis and say pot use among pregnant women ages 18 to 24 increased the most. One caveat: urine samples were taken at just eight weeks of gestation, so the women may have used the drug before they knew they were pregnant. It’s thought the growing acceptance of marijuana may be driving the trend, which could be bad news for babies as early scientific evidence suggests “prenatal marijuana may impair fetal growth and neurological development.” (UPI)