In Canada, 50 percent of pregnant women take prescription medication. Yet many of them prefer to use natural health products during the pregnancy. Scientists believe these products to be safe because they are natural. But in reality, they are chemical products and, many of the risks and benefits of these products contrarily to medication are unknown. The most consumed natural health products by pregnant women are chamomile (19 percent), green tea (17 percent), peppered mint (12 percent), and flaxseed oil (12 percent). And of these products to premature births, only one product has a very strong correlation - flaxseed oil. A study has found that the risks of a premature birth quadruple if flaxseed oil is consumed in the last two trimesters of pregnancy. According to researchers, the average rate of premature births is 2 to 3 percent in the general population. But for women consuming flaxseed oil in their last two trimesters that number jumps up to 12 percent.