According to the World Bank, Ukraine’s 2020 birth rate was 1.22 children per 1,000 woman, one of the world’s lowest.
By comparison, the global average rate was 2.2 and 1.4 in Canada, 1.51 in Russia, 1.56 in the United Kingdom and 2.21 in Peru.
Source: In the grips of war, Ukraine faces bleak demographic future | Russia-Ukraine war News | Al Jazeera
The U.S. is about 1.8. A fertility rate of 2.1 is break even replacement – need to be above 2.1 to grow the population. This is trend decline is not reversible for most countries due to the many issues that have led to this point.