There are several Doula Association around the world. DONA is one of the largest. Here is a passage from their website:
It is an exciting time to be a DONA International doula, a member of the premier doula association in the world. Women across the globe appreciate and value the experience of having a doula– a knowledgeable, experienced companion – who stays with them through labor, birth and beyond.Birth doulas offer emotional support, encouragement and wisdom throughout labor and birth. Postpartum doulas support women and families through the transformation that a new baby brings to a family.
With over 7000 birth and postpartum doula members and growing, we are the largest doula association in the world. We support doulas by providing quality training and meaningful certification. We serve mothers and families by providing access to information and research about doulas, childbirth and the postpartum experience. DONA International certification sets the bar for doula education and professional development. It indicates to families that a doula has achieved a high level of training and professionalism.