Carolyn is a CNM with a long history of midwifery and birth work, dating back into the 1970. She has part in theicipated writing of Varney's Midwifery, she has been in clinical practice, has taught and led the midwifery program at Georgetown, and is currently the owner and instructor of Ultrasound for Midwives--an excellent course offering both didactic and hands-on skills for midwives. Check out the episode and links below to ultrasound course website.  

https://www.ultrasoundformidwives.com/about-1