Mothers around the country are waiting longer than ever to have their first baby.

Since 2000, the average age of first-time moms has gone up by 1.4 years to around 26, according to the Centers for Disease Control and Prevention.

Researchers attributed the rising average age for new mothers to a significant drop in teen pregnancies. At the other end of the spectrum, the growing number of women over the age of 30 giving birth for the first time also contributed to the older-new-mom phenomenon.

The shift happened in every state and across all racial and ethnic groups.