The CDC collects data on abortions by contacting the central health agency for 48 states. The study excludes California, one of the most populous states in the nation. This study examined the abortion rate from 2007 to 2016.

Researchers found the abortion rate declined from 188 abortions per 1,000 live births in 2015, to 186 abortions in 2016, and 26% over the entire period of the study. The agency found a total of 623,471 abortions in 2016, the vast majority in the first trimester.

Most women who terminated a pregnancy were in their 20s, had never had an abortion, and already had children.

Other recent studies suggest the declining abortion rate is not the result of high-profile abortions restrictions passed during the Trump administration – such as six-week abortion bans now hung up in court. Rather, declining abortions rates coincide with declining fertility rates, suggesting fewer women are getting pregnant.