Thanks to the recession, fewer babies are being born in the United States. Wall Street analysts wonder how long it will affect the fortunes of one of Philadelphia's major corporations, clothing manufacturer and retailer Destination Maternity. "Hard times tend to cause families to have fewer children or to delay having children," said William Stull, a professor of economics at Temple. Even though humans can be irrational, Stull said, it's common sense to reconsider having children in the depths of a bad economy, when people all around have lost jobs. A big question for Stull isn't when these delayed births will actually occur, but whether Americans will reverse the trend of declining family size that began decades ago.