Waaaait a second. If Ultrasound can render sperm inactive (Or possibly Dead) for 6 months at a time with 1 or 2 treatments...
... Then what is an ultrasound doing to a baby in utero ? I thought it was perfectly safe ?
Babies in utero don’t produce sperm.
Actually, there is a growing movement to limit the availability of ultrasounds during pregnancy because of questions regarding safety. Especially now that commercial 3D ultrasounds are so popular.
On a mothers’ forum I’m on there are quite a few women who declined them b/c they did not believe they were without risk.