https://www.statista.com/statistics/1033027/fertility-rate-us-1800-2020/ https://www.statista.com/statistics/1033027/fertility-rate-u... The above shows the bo

https://www.statista.com/statistics/1033027/fertility-rate-us-1800-2020/ https://www.statista.com/statistics/1033027/fertility-rate-u... The above shows the boom started in the 40s in the U.S. after 140 years of gradual decline.