The Japanese, who have been struggling with a declining workforce for several years, have offered financial incentives for families to have children, but to virtually no effect.
France, on the other hand, seems to have had some modest success. Its fertility rate is below replacement, but is closer to it than Germany and Italy. French parents receive relatively generous child allowances, varying with the number of children in a family, but worth several thousand dollars a year. They get about $300 per month for a second child and about $410 per month for each child after that plus other substantial subsidies totalling, for a family of three young children, close to $20,000 per annum.
Who'd a thunk that people would be getting paid to get laid, by the gubbmint no less?