Dom1 9 Jul 2015 #1Ireland and Poland are both Catholic countries mostly. Poland is probably more catholic overall. Catholicism is well-known for encouraging procreation. However, Poland has a much lower fertility rate than Ireland. The total expected fertility rate for 2015 (ie number of children expected to be born per woman in her child bearing years) is 1.4 and 2 respectively.en.m.wikipedia.org/wiki/List_of_sovereign_states_and_dependent_territories_by_fertility_rateThere is an even bigger difference if you look at historic data. Any idea why Ireland makes so many more babies than Poland? Is it because polish women are more likely to ignore what the church tells them, or because Irish gals are more virile? Or because a better economic situation in Ireland means people can more easily afford the bills?