My point still stands that it's not the science holding us back as much as social attitudes and pharmaceutical company decision making. Pharmaceutical companies do not see this as very profitable, so it's likely they are making false assumptions about male family planning and gender norms.
Even beyond that if you take out any assumptions about male attitudes, society has taught women that they need to accept more invasive measures for family planning, and it just takes time for men to get used to that too. However, as much as attitudes are changing there are some men that will not take up this responsibility, and I say this as a progressive person that has to work with many conservative people that have extremely regressive views about gender norms that are too stubborn and willfully ignorant to be educated otherwise.
I'll just leave these here for those who are actually interested in making this a reality and learning the science and history of where we're at:
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6419257/
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4762912/
- https://www.healthline.com/health-news/male-birth-control
- https://www.fatherly.com/health-science/male-birth-control-v...