The teen birth rate in the United States rose for a second consecutive year in 2007 after a long decline.
The National Center for Health Statistics said more babies were born to all mothers than even at the peak of the baby boom after World War II.
The rate of premature births and low birthweight babies declined after a long upward trend.
But Cesarean deliveries rose for an 11th consecutive year to a new high - up 2% to 31.8% of births.
A record 39.7% of babies in 2007 were born to unmarried women, including 71.6% of black babies and 51.3% of Hispanic babies.
The birth rate for teenage girls rose 5% between 2005 - 2007.