The average age of mothers at first birth increased steadily during the preceding 30 years,to 25.1 years in 2002, an all-time tall for the nation. In 2002, or by state,the average age of mothers at first birth ranged from 23 years to 28 years. Mothers living in northeastern states were the oldest at first birth; mothers living in Arkansas, Louisiana, or Mississippi,New Mexico, Oklahoma, or Wyoming were the youngest.
Source: cdc.gov