About 71 percent questioned in the study of nearly 4,000 women ages 25 to 45 who were sexually active said they were not trying to get pregnant, while 6 percent said they were. But nearly one in four, or 23 percent, told researchers they were "OK either way," meaning they were neither trying to conceive, nor trying to prevent a pregnancy.
"If health-care providers only ask women if they are currently trying to get pregnant and women say no, then the assumption is that they are trying not to get pregnant," McQuillan said. "Clearly, many women are less intentional about pregnancy. Yet this group should be treated as if they will likely conceive and should therefore get recommendations such as ensuring adequate folic acid intake and limiting alcohol intake."
Ed Payne of CNN has more: Link