Post-WW2 Soviet Union had a drop in fertility rates, so no: https://direct.mit.edu/rest/article-abstract/99/2/229/58403/The-Lasting-Effect-of-Sex-Ratio-Imbalan

Post-WW2 Soviet Union had a drop in fertility rates, so no: https://direct.mit.edu/rest/article-abstract/99/2/229/58403/The-Lasting-Effect-of-Sex-Ratio-Imbalance-on?redirectedFrom=fulltext https://direct.mit.edu/rest/article-abstract/99/2/229/58403/... Any data on Paraguay?