1. 10% quota cap on female higher education 2. increase the income gap to 50% in favor of men for marriage formation (profession bans) 3. throw women out of the public sector (outside childcare and health) which is 60-70% female 4. ban pregnancy simulating hormone medication pshms for unmarried women start with step 1 and watch results its probably enough but you can proceeed to 4 and it will do it for sure you do not have to do it but step 1 is necessary if you do not want to wait for abject poverty to bring the birthrate up
Germany