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.
Sex-selective abortion
In 2017, according to CIA estimates, the countries with the highest birth sex ratio were Liechtenstein (125), Northern Mariana Islands (116), China (114), Armenia (112), Falkland Islands (112), India (112), Grenada (110), Hong Kong (110), Vietnam (110), Albania (109), Azerbaijan (109), San Marino (109), Isle of Man (108), Kosovo (108) and Macedonia (108). Also in 2017 the lowest ratio (ie. more girls born) was in Nauru at (0.83). There were ratios of 102 and below in several countries, most of them African countries or Black/African majority population Caribbean countries: Angola, Aruba, Barbados, Bermuda, Burkina Faso, Burundi, Cabo Verde, Cameroon, Cayman Islands, Central African Republic, Chad, Comoros, Republic of the Congo, Cote d'Ivoire, Djibouti, Eritrea, Eswatini, Ethiopia, Gabon, The Gambia, Ghana, Guinea-Bissau, Haiti, Kazakhstan, Leshoto, Liberia, Madagascar, Malawi, Mali, Mauritania, Mozambique, Niger, Puerto Rico, Qatar, Senegal, Sierra Leone, Somalia, South Africa, Togo, Uganda, Zambia.