For most of the past five years, Americans have been fairly evenly divided in their association with the two abortion labels. The only exception between 2010 and 2014 was in May 2012, when the pro-life position led by 50% to 41%.

Prior to 2009, the pro-choice side almost always predominated, including in the mid-1990s by a substantial margin. While support for the pro-choice position has yet to return to the 53% to 56% level seen at the time, the trend has been moving in that direction since the 2012 reading.

While Gallup does not define the pro-choice and pro-life terms for Americans, their answers to a separate question about the legality of abortion indicate that those favoring the pro-choice label generally support broad abortion rights, while pro-life adherents mostly favor limited or no abortion rights.