America's fertility rate and the number of births nationwide are continuing to decline.
원문출처 : https://www.cnn.com/2019/05/15/health/us-birth-rate-record-low-cdc-study/index.html
원문출처 : https://www.cnn.com/2019/05/15/health/us-birth-rate-record-low-cdc-study/index.html