New figures from the Center for Disease Control and Prevention reveal that teen birth rates in the United States have hit an all-time low.

As as 2014, there were just 24 births per 1,000 girls under the age of 19. According to a new report from the CDC, these numbers plummeted 10-percent in one year.

At the same time, women ages 30 and older were reported as having more children -- they accounted for 30-percent of births in 2014. In 2000, mothers 30 and older accounted for 24-percent of births.

There were other changes in U.S. birth patterns as well.

The infant mortality rate decreased to a historic low in 2014 -- about six infant deaths per 1,000 births, the findings show.

Other key findings from the report included:

  • Decreases in cesarean deliveries continued, and preterm births declined for the seventh year.
  • Death rates for children aged 1 to 19 did not change significantly between 2013 and 2014. Unintentional injuries and suicide were the top two causes of death in this age group.

Researchers suggest that decline in teen births may be related to social ideas that being pregnant is less acceptable among teens. In addition, more teens have access to birth control -- especially long-lasting, intrauterine devices (IUDs) and implants that prevent pregnancy.

For the report, researchers used 2013-2014 records, including birth certificates, death certificates and reports of fetal death across the United States.

This study was published online in the journal of Pediatrics.

Information for this story was gathered from HealthDay.

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April Stevens is a multi-platform producer at WZZM 13. Have a news tip? Email, visit our Facebook page or Twitter.