US fertility is below the replacement rate at 1.73 births per woman, the increase is coming from immigration, so the US per-se isn't contributing to net populat

US fertility is below the replacement rate at 1.73 births per woman, the increase is coming from immigration, so the US per-se isn't contributing to net population growth and arguably, when immigrant women come to the US, they are converted in 1 or 2 generations from high fertility rate to low fertility rate due to education, career, standard of living and culture changes.