Study was a non-interventional, prospective study of pregnant women who agreed to provide information about their medication use and certain lifestyle factors on a periodic basis throughout their pregnancy. Volunteers were recruited by measures such as placement of pamphlets near pregnancy test kits in pharmacies and by links from carefully selected websites and social networking sites. Subjects were invited to learn about the study either through visiting the study web site or phoning a telephone number where a recorded message described the study and invite eligible women to register for participation.