However, empowering women has been found to work ie educating women so they can be educated and have independence and autonomy and to have family planning clinics allowing the woman to have contraceptives and abortions. These can be implemented through government policy.
Another way fertility can be reduced is through empowering children. Basically this means giving children what they want, giving them safety and education. For example, in the past child labour was legal which meant that children suffered, but it also meant parents were able to make money by having children because they can put their kids to work to earn money for themselves. Laws that banned child labour effectively made having kids more expensive and so people had fewer kids. Another example of child empowerment are regulations on childcare. In some countries there are safety laws on childcares requiring them to be staffed by suitably qualified people or to have certain health and safety standards. This raised the price of these childcares thereby making having kids more expensive but the result is that kids have better childcares. The same applies with schools as well as things like child seats in cars. There have been studies done that show that higher child car seat requirements reduce fertility rate. This is a win-win because fertility drops which reduces suffering but also the children experience more safety in cars.
Another area where "empowerment" may apply is for animals. Efilists are concerned about animal suffering and rightly so as animals suffer considerably especially in wildlife. However, the Calhoun rat experiment shows that if you give a population of mice infinite food then over time the population will dwindle. Another famous experiment is the rat level experiment that shows that when rats press a lever and are rewarded and become addicted to that reward then they will continually press that level even if it means they forego reproductive opportunities.
Empowerment even applies to old people. If you make old age more pleasant eg give good healthcare, then many people may be happy to grow old and have the government help them rather than their children. Government spending on welfare for the old eg pensions also help give the old a better lifestyle with less suffering. However, a consequence of all this is also that more government spending on the old means more taxes on the young in order to pay for the old which means that prospective parents will need to work even more. Money that goes to old people via the tax system is money that is likely diverted away from young people who would otherwise have used that money to have a baby.
My main point is that there seems to be a pattern here that "empowerment" tends to reduce fertility rate. This is important because "empowerment" is an easy sell. Why not educate women? Why not make childcares safer? Why not feed animals? By focusing on empowerment, you give immediate relief from suffering, you give beings what they want, and the result is less procreation, which leads to long term reductions in suffering.