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.
Prevalence of teenage pregnancy
Nordic countries, such as Denmark and Sweden, also have low rates of teenage birth (both have 7 births per 1,000 women aged 15–19 in 2002). However, Norway's birth rate is slightly higher (11 births per 1,000 women aged 15–19 in 2002) and Iceland has a birth rate of 19 per 1,000 women aged 15–19 (nearly the same as the UK). These countries have higher abortion rates than the Netherlands.