Birth rate
The region of Sub-Saharan Africa has the highest birth rate in the world. As of 2016, Niger, Mali, Uganda, Zambia, and Burundi have the highest birth rates in the world. This is part of the fertility-income paradox, as these countries are very poor, and it may seem counter-intuitive for families there to have so many children. The inverse relationship between income and fertility has been termed a "demographic-economic "paradox"" by the notion that greater means would enable the production of more offspring as suggested by the influential Thomas Malthus.
Demographics of Russia
In 2012, the birth rate increased again. Russia recorded 1,896,263 births, the highest number since 1990, and even exceeding annual births during the period 1967–1969, with a TFR of 1.691, the highest since 1991. (Source: Vital statistics table below). In fact, Russia, despite having only slightly more people than Japan, has recently had nearly twice as many births as that country. The number of births was expected to fall over the next few years as women born during the baby bust in the 1990s enter their prime childbearing years, but this didn't occur thanks to the continued growth of the TFR. The figures for 2013-2015 again showed around 1.9 million births, about the same as in 2012, but because the number of women of childbearing age is dropping, especially for those in their early 20s, the TFR actually rose to 1.777, which places Russia at first 9 or 10 countries out of 50 developed nations, and at 6th place in Europe.