Birth rate
As of 2017, Niger has the highest birth rate in the world with 49.443 per thousand people. 
Japan has one of the lowest birth rates in the world with 8 per thousand people.
While in Japan there are 126 million people and in Niger 21 million, both countries had around 1 million babies born in 2016.
Health in Guatemala
Reproductive health focuses on the health of infants as well as mothers. Guatemala is only beginning their transition into a more health-centered nation. The overall Guatemalan population is very young, which not only affects infant mortality rates, but significantly impacts both reproductive age and fertility rates. In Guatemala, the fertility rate is almost 5 children per mother, the highest in all of Latin America.