https://www.ncbi.nlm.nih.gov/pubmed/407106 https://www.ncbi.nlm.nih.gov/pubmed/407106 it's been known since at least 1977. https://m.timesofindia.com/home/sci

https://www.ncbi.nlm.nih.gov/pubmed/407106 https://www.ncbi.nlm.nih.gov/pubmed/407106 it's been known since at least 1977. https://m.timesofindia.com/home/science/Ultrasound-waves-as-contraceptive/articleshow/5923438.cms https://m.timesofindia.com/home/science/Ultrasound-waves-as-... there's another company that confirms it works, yet denounces it for sake of supporting another contraceptive method they have produced that uses radiation. https://www.parsemus.org/projects/ultrasound/ https://www.parsemus.org/projects/ultrasound/