In response to multiple requests and in an effort to improve consistency with other reports, we are no longer defining teens by estimated age at conception. Instead, all tabulations are by age at the end of pregnancy. Data are also provided separately for teens of Hispanic ethnicity, who may be included in any of the above race groups. County-level data are limited to white, black and other race groups. All of these charts are in pdf format.
Maternal age is based on the age of the mother at the time of delivery.
As above, this count represents the number of teens, not the number of fetuses, and age is based on age at the end of pregnancy. This provides a minimum estimate of pregnancies since it does not include miscarriages that are not registered. For pregnancies, the age is also based on the age of the mother at the time of outcome. Population denominators annual 1990 post-census population estimates from the U.S. Bureau of the Census. The Census Bureau updates its mid-year population estimates annually.