A Canadian study pioneered by the Toronto-based Motherisk Program revealed that more than 50 percent of pregnant women use either ginger tablets or tea, according to the "International Journal of Food Properties" article. Other studies have established that between 6 percent and 12 percent of pregnant women use ginger herbal preparations to treat NVP. In these studies, the women who used ginger experienced a significant decrease in NVP. Interestingly, the researchers also observed a reduction in the risk of losing pregnancies among the women who used ginger.