Some midwives with this type of professional background are certified by the American Midwifery Certification Board, which allows them to refer to themselves as Certified Midwives or Certified Professional Midwives.
Most US women practicing midwifery are part of professional associations which keep records, provide training, and require their members to aquire continuing education hours.
Certified Nurse Midwives (CNMs) and Certified Midwives (CMs) are educated in the disciplines of midwifery and nursing.
This is someone who has studied midwifery in addition to traditional nursing.
In 2005, The ACNM celebrated its 50th anniversary of midwifery in the USA.