FILE - In this March 5, 2009 file photo, job seekers join a line of hundreds of people at a job fair in New York. Tough economic conditions, including the Great Recession, are blamed for a five-year drop in the number of babies born in the U.S., starting in 2007. A new study presented in a paper released Monday, Sept. 29, 2014, by the Proceedings of the National Academy of Science suggests that for some U.S. women, living through a recession can mean they will never have children. (AP Photo/Mark Lennihan, File)