Birth rate
According to the CIA's "The World Factbook", the country with the highest birth rate is Niger at 6.49 children born per woman and the country with the lowest birth rate is Taiwan, at 1.13 children born per woman.
Sex-selective abortion
Abnormal sex ratios at birth, possibly explained by growing incidence of sex-selective abortion, have also been noted in some other countries outside South and East Asia. According to CIA, the most imbalanced birth sex ratios in Europe (2017) are in Liechtenstein, Armenia, Albania, Azerbaijan, San Marino, Kosovo and Macedonia; with Liechtenstein having the most imbalanced sex ratio in the world.