In this episode, Yo gets inside her own head and looks at some philosophical ideas as to why ultrasound is so prevalent, as well as discussing the lack of evidence that ultrasound is safe, a couple of studies that have shown that ultrasound damages cells, animal studies, and the economic machine that drives ultrasound use. She also examines some of the cognitive dissonance around ultrasound in the medical community. For more, visit www.freebirth.ca