Comment Re:Infant Mortality Rates (Score 1) 1063
In the U.S. being "born alive" is defined by Federal Statute. http://www.law.cornell.edu/uscode/text/1/8
Some information about differences by nation is contained on page 7 of this Congressional Research Service report: http://www.fas.org/sgp/crs/misc/R41378.pdf
This is nearly a decade old, so some changes may have occurred.