The alarm bells are sounding on the fertility front as countries around the world face historically low birth rates. In the United States, the number of annual births in 2020 sagged to 3,605,201, the weakest level since 1979. Overall, the population grew at the second-slowest rate since records began in 1790. Meanwhile, a handful of East Asian countries have seen their birth rates dip to at or below 1.0. And many middle-income countries such as Iran and Brazil now have birth rates below the replacement level of 2.1 children per woman. Continue reading this article on Fast Company.