The Center for Disease Control (“CDC”) has been tracking the number and characteristics of women obtaining legal abortions since 1969. No state is required to report, and most states report if an abortion was medical or surgical. The 2019 report excludes California, Maryland, and New Hampshire, but includes the District of Columbia.
The CDC measures abortion by both abortion rate and abortion ratio. Abortion rate is the number of abortions per 1,000 women within a given population. Abortion ratio is the number of abortions per 1,000 live births within a given population.