The Nordic countries are among the most typical exponents of this trend. But even with that, reproduction is still slightly below replacement. It is also unclear how much of the population growth comes from recently immigrated groups from cultures where children are still seen as a proof of virility, a source of influence in one's in-group, and a guarantee for safety in old age.
Overall, though, these countries have policies that explicitly ease the economic burden of having children, and they have had these policies for a long time so people don't expect them to vaporize after the next election. This is important - you can't return your children after all.