immigrants experience an immediate drop in birth rates as well, and they level out to under-replacement rates in a single generation. guess why? because immigrant women who would have been kept at home to raise children in their home countries now find jobs and have incomes here. they're no longer as loyal to or reliant on their husbands and families, and they "don't have time" to raise children because they're working all day. same story in every single nation that allows women in the work force, independent of pretty much all other factors like race, iq, education, even culture. the only immigrants pumping out 10 rapefugee spawn upon arrival are the ones that don't assimilate and keep their wives at home out of the work force.
United States