A study appearing in the online version of Anesthesiology found that more than 14 percent of pregnant women were prescribed opioids for pain at some time during their pregnancy. Back pain was the most common condition (37 percent) for which opioids were prescribed. Other conditions included abdominal pain, migraine, joint pain, and fibromyalgia. The researchers suggest that the safety of this practice is uncertain and that more research is needed to assess the risk of opioids to unborn babies as well as to the mothers. Read a news report here.