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.
Childbirth in Zambia
The maternal mortality rate is 224 deaths per 100,000 births, which is the 23rd highest in the world. The mean age of mothers at birth is 19.3 years old, and the fertility rate is 5.72 children born per woman, which is the 7th highest in the world. The contraceptive rate is only 40.8%, and the birth rate is the 4th highest in the world at 42.13 births/1,000 population. Infectious disease is a key contributor to the poor health of the nation, and the risk is very high for diseases such as protozoal and bacterial diarrhea, hepatitis A, typhoid fever, malaria, dengue fever, schistosomiasis, and rabies. The adult prevalence rate of HIV/AIDS is 12.37%, which is the 7th highest in the world.