A data set of comprehensive historical statistics on the incidence of pregnancy, birth and abortion for people of all reproductive ages in the United States. National statistics cover the period from 1973 to 2020, the most recent year for which comparable data are available; state-level statistics are for selected years from 1988 to 2020. For a report describing key highlights from these data, as well as a methodology appendix describing our methods of estimation and data sources used, see https://www.guttmacher.org/report/pregnancies-births-abortions-in-united-states-1973-2020. The data set is available in multiple formats (Stata, R, SPSS and SAS). As new data become available, we plan to continue making iterative improvements to our methodology; consequently, future releases of this data set will also include recalculated estimates for all available years. Prior data releases will continue to be available on this page for purposes of comparison and to maintain reproducibility of analyses that used earlier versions of the data. An online codebook for these data is available at https://guttinst.github.io/National-State-Pregnancy-Codebook-1973-2020. The online codebook for the 2017 release of data (highlighted in https://www.guttmacher.org/report/pregnancies-births-abortions-in-united-states-1973-2017) continues to be available at https://guttinst.github.io/National-State-Pregnancy-Codebook-1973-2017).