You know how this goes, right?
The resulting thirst for scientific knowledge results in unparalleled technological advancement, but also an endless demand deciduous teeth for further experimentation. Eventually their personally-developed, secretly manufactured and deployed microdrone monitoring network alerts them every time any child loses a tooth in the Western world. Slightly larger drones sneak into the home and collect the tooth. In an attempt to avoid further pressing of ethical boundaries, the drones are equipped to carry in small amounts of currency that are left in place of the tooth. Your family, more literally and on a larger scale than any family before, DOES the tooth fairy 🧚 stuff.
Friendly reminder of the core problem: medical treatments are all balanced against the risk of what it counteracts.
Undergoing physical and chemical changes to grow another creature inside you and have it damage everything on the way out is pretty risky. Female birth control only has to be less risky than that.
A male has zero physiological risk from impregnating someone. Therefore, anything except a miracle drug with high efficacy and almost zero side effects is going to stall at the trial stage.
On another note, that speaks to how safe and effective vasectomies are.