Fertility

The U.S. birth rate is now at the lowest recorded level ever - or at least since record-keeping began in 1920. Births were increasing but plunged after the 2007 recession. The biggest decrease is among immigrant groups, particularly Mexican women.
Dec 3, 2012   Pew Research Center
Halloween may mark the world reaching 7 billion. Population author Vanessa Baird looks beyond the number into both fertility and consumption rates, showing why it is a mistake to get caught up with the increase in population rather than consumption.
Oct 28, 2011   The Guardian - U.K.