It's a little more complicated than that: not all religious groups consider all forms of birth control to be sinful, and these trends don't apply in all countri

It's a little more complicated than that: not all religious groups consider all forms of birth control to be sinful, and these trends don't apply in all countries. Increased religiosity won't necessarily increase the birth rate. Disclosure: my mum, Marion Burkimsher, is a demographic researcher specialising in this area. She's also studied fertility of migrants (the TFR statistics are skewed). https://www.researchgate.net/profile/Marion_Burkimsher/publication/338966806_Investigating_Family_Size_Differentials_by_Religiosity_Across_Europe_National_Contexts_Expectations_and_Outcomes/links/5ebbc512458515626ca5ae4f/Investigating-Family-Size-Differentials-by-Religiosity-Across-Europe-National-Contexts-Expectations-and-Outcomes.pdf https://www.researchgate.net/profile/Marion_Burkimsher/publi...