>>310264>a bath of 47°C for 45 minutes a day for 3 weeks>why was her research ignored?Sounds perfectly reasonable that this would be ignored. It's not exactly new information, even in the early 20th century, that male fertility is highly sensitive to temperature regulation in the testes, and scalding your body with boiling water isn't exactly viable.
A more viable alternative is prolonged and low-intensity heating, like something that results from wearing tight clothing. Making moids wear dick-binders can significantly reduce sperm count to the point of being an effective contraceptive, and I'd argue the negative health effects are far less severe than female contraceptives.
The reason the latter isn't done is because men like to push their problems onto women.