Puesto que no existen estudios realizados en Español, nos basamos en referencias en diferentes idiomas, Inglés, Francés, Portugués, Sueco, etc. 
De todas maneras todos los artículos de la OMS (Organización Mundial de la Salud) se encuentran en los apartados en Español.


BirthRights. Human Rights in Maternity Care. 2013. 
[Accessed 18 February 2015]


Brigstocke S. MIDIRS Midwifery Digest, vol 24 no. 2, 2014, pp 157-160


Hodnett ED, Gates S, Hofmeyr G, Sakala C. Continuous support for women during childbirth. 
Cochrane Database of Systematic Reviews 2013, Issue 7. Art. No.: CD003766. DOI: 10.1002/14651858.CD003766.pub5 2008
Female relatives or friends trained as labor doulas: outcomes at 6 to 8 weeks postpartum

Campbell D, Scott KD, Klaus MH, Falk M - Graduate Division, University of Medicine and Dentistry of New Jersey, Newark, New Jersey, USA.


Amorim MMR and Katz L. Continuous support for women during childbirth: RHL commentary (last revised: 1 May 2012). 
The WHO Reproductive Health Library; Geneva: World Health Organization.


Continuous support for women during childbirth
Hodnett ED, Gates S, Hofmeyr GJ, Sakala C - Cochrane review abstract and plain language summary, prepared and maintained by The Cochrane Collaboration, currently published in The Cochrane Database of Systematic Reviews 2008 Issue 2, Copyright © 2008 The Cochrane Collaboration. Published by John Wiley and Sons, Ltd.. The full text of the review is available in The Cochrane Library (ISSN 1464-780X).

Doctors and doulas in the labor and delivery suite
Version html Kuczkowski KM, Acta Anaesthesiol Scand. 2007 Aug;51(7):954-5.


Effects of psychosocial support during labour and childbirth on breastfeeding, medical interventions, and mothers' wellbeing in a Mexican public hospital: a randomised clinical trial
Langer A, Campero L, Garcia C, Reynoso S - The Population Council, Regional Office for Latin America and the Caribbean, Colonia Coyoacán, México DF, Mexico.

A randomized control trial of continuous support in labor by a lay doula
Study on Sleep & Functional Performance in Heart Failure at the University of Medicine and Dentistry of New Jersey, School of Nursing, Newark 07101-1709, and Division of Maternal Fetal Medicine, Saint Peter's University Hospital, New Brunswick, NJ, USA.

Nurses and doulas: complementary roles to provide optimal maternity care
Ballen LE, Fulcher AJ, J Obstet Gynecol Neonatal Nurs. 2006. Mar-Apr; 35 (2) : 304-11.

On Labor support and doulas
Buck L, AWHONN Lifelines. 2006 Aug-Sep; 10 (4): 279-280.

They call them "doulas" or "birth attendants
Halle L, Baddour C, Rev Infirm. 2006 Jun-Jul; (122): 39 (français).

Doulas as Community Health Workers: Lessons Learned from a Volunteer Program
Kane Low L, Moffat A, Brennan P, J Perinat Educ. 2006 Summer;15(3):25-33.

Use of a doula for labor coaching in a patient with indolent mastocytosis in pregnancy
Kehoe SL, Bathgate SL, Macri CJ, Obstet Gynecol. 2006 feb; 107 (2 Pt 2) : 514-516.

Doula Support and Attitudes of Intrapartum Nurses: A qualitative Study from the Patient's Perspective
Papagni K, Buckner E, J Perinat Educ. 2006 Winter; 15 (1): 11-8.


Perceptions of social support from pregnant and parenting teens using community-based doulas
Breedlove G, J Perinat Educ. 2005 Summer; 14 (3): 15-22.

Evidence on support during labor and delivery: a literature review
Bruggeman OM, Parpinelli MA, Osis MJ., Cad Saude Publica. 2005 Sep-Oct; 21 (5):1316-27. Epub 2005 Sep 12 Review. (Portugais)

Doulas a childbirth paraprofessionals: results from a national survey
Lantez PM, Low LK, Varkey S, Watson RL Womens Health Issues. 2005 May-June; 15 (3):109-16.

Sustaining rural maternity care – don't forget the RNs
Medves JM, Davies BL, Can J Rural Med. 2005 Winter; 10 (1): 29-35.

Doula birth support for incarcerated pregnant women
Schroeder C, Bell J, Public Health Nurs. 2005 Jan-Feb; 22 (1): 53-8.

Lower epidural anesthesia use associated with labor support by student nurse doulas: implications for intrapartal nursing practise
Van Zandt SE, Edwards L, Jordan ET, Complement Ther Clin Pract. 2005 Aug; 11 (3): 153-60

Doulas are necessary!
Waldenstrom U, Lakartidningen. 2005 Jan 24-30; 102: 221-2. Swedish


Childbirth Educators, Doulas, Nurses, and Women Respond to the Six care Practices for Normal Birth
Curl M, Davies R, Lothian S, Pascali-Bonaro D, Scaer RM, Walsh A, J perinat Educ. 2004 Spring; 13 (2): 42-50.

Doulas are helpful, but they're not nurses
Phillips E, RN. 2004 Jul; 67 (7):12.

Do maternity care provider groups have different attitudes towards birth?
Reime B, Klein MC, Kelly A, Duxbury N, Saxell L, Liston R, Prompers FJ, Entjes RS, Wong V, BJOG. 2004 Dec; 111 (12): 1388-93.

Position statement 6: doulas
Royal College of Midwives, 2004 sep; 7 (9): suppl 1.


Postpartum depression: Bridging the gap between medicalized birth and social support (2002)
Goldbort, J. (2002) International Journal of Childbirth Education Vol 17(4):11-17.

Beyond holding hands: the modern role of the professional doula
Gilliland AL, J Obstet Gynecol Neonatal Nurs. 2002 Nov-Dec; 31 (6): 762-9.


Doulas: an alternative yet complementary addition to care during childbirth
Kayne MA, Greulich MB, Albers LL, Clin Obstet Gynecol. 2001 Dec 44 (4): 692-703.

Doulas supporting women during labor: the experience at the Sofia Feldeman Hospital
Leao MR, Bastos MA, Rev Lat Am Enfermagem.2001 May; 9 (3): 90-4. (Portugais)


Benefits of massage therapy and use of a doula during labor and childbirth (2000)
Keenan P. Altern Ther Health Med 2000 Jan;6(1):66-74 Potomac Massage Training Institute, USA.


The obstetrical and postpartum benefits of continuous support during childbirth (1999)
Scott KD, Klaus PH, Klaus MH. J Womens Health Gend Based Med 1999 Dec;8(10):1257-64 Division of Public Health, County of Sonoma Department of Health Services, Santa Rosa, California 95404, USA.

Continuous emotional support during labor in a hospital
Kennell JH, Klaus M, & McGrath SK, 1999 , JAMA, vol. 265, pp. 2197-2201.

A comparison of intermittent and continuous support during labor: a meta-analysis
Scott KD, Berkowitz G, Klaus M, Am Obstet Gynecol. 1999 May; 180 (5):1054-9.

Doula support vs. epidural analgesia: Impact on cesarean rates
McGrath, SK, Kennell JH, & Suresh M, 1999, Pediatric Res, vol. 45, no. 16A.

Effects of providing hospital-based doulas in health maintenance organization hospitals
Gordon NP, Walton D, McAdam E, Derman J, Gallietro G, Garrett L, Obstet Gynecol. 1999 Mar; 93 (3): 422-6.


Effects of psychosocial support during labour and childbirth on breastfeeding, medical interventions, and mother´s wellbeing in a Mexican public hospital: a randomised clinical trial
Langer A, Campero L, Garcia C, Reynoso S. Br J Obstet Gynaecol 1998 Oct;105(10):1056-63 The Population Council, Regional Office for Latin America and the Caribbean, Colonia Coyoacan, Mexico DF, Mexico.

The Chicago doula project: A collaborative effort in perinatal support for birthing teens
Glink P, 1998, Zero to Three, vol. 18, pp 44-50.

Doulas: exploring their roles with parents, hospitals, and nurses
Perez PG, Herrick LM, AWHONN Lifelines. 1998 Apr; 2 (2): 54-5.

First stage labor management: An examination of patterned breathing and fatigue
Pugh LC, Milligan RA, Gray S, Strickland OL Birth. 1998. Dec; 25 (4): 241-5.

Doulas: into the mainstream of maternity care
Young D, Birth. 1998 Dec; 25 (4): 213-4.


The doula: an essential ingredient of childbirth rediscovered
Klaus MH, Kennell JH, Acta Paediatr 1997 Oct; 86 (10): 1034-6.

Doulas. Aids or opportunists?
Mainord M, Tenn Nurse. 1997 Jun; 60 (3): 21.

A randomized trial of one-to-one nurse support of women in labor
Gagnon, AJ, Waghorn K, Covell C, Birth, 1997, vol 24, pp 71-77.


Supporting women in labour: the doula's role
Nolan M Mod Midwife. 1995 Mar; 5 (3): 12-5.


Family practice maternity care in America: ruminations on reproducing an endangered species – family physicians who deliver babies
Larimore WL, Reynolds JL J Am Board Fam Pract. 1994 Nov-Dec; 7 (6): 478-488.


Labor support by a doula for middle-income couples: the effect on cesarean rates
Kennell JH, & McGrath SK, 1993 , Pediatric Res., vol. 33, no. 12A.


Doulas and the quality of maternity servicesHodnett E, Birth. 1992 Sep; 19 (3): 172. Doulas and the quality of maternity services Richards MP, Birth. 1992 Mar; 19 (1): 40-1


Companionship to modify the clinical birth environment: effects on progress and perceptions of labour, and breastfeeding
Hofmeyr GJ, Nikodem VC, Wolman WL, Chalmers BE, Kramer T. 1991

Continuous emotional support during labor in a US hospital. A randomized controlled trial (1991)
Kennell J, Klaus M, McGrath S, Robertson S, Hinkley C. JAMA 1991 May 1;265(17):2197-201 Department of Pediatrics, Case Western Reserve University, Cleveland, OH


A randomized trial of the effects of monitrice support during labor: mothers views two to four weeks postpartum
Hodnett ED, Osborn RW., 1989

A randomized controlled trial of continuous labor support for middle-class couples: effect on cesarean delivery rates
McGrath SK, Kennell JH - Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio 44106, USA.


Effects of social support during parturition on maternal and infant morbidity.
Klaus MH, Kennell JH, Robertson SS, Sosa R.,1986


The effect of a supportive companion on perinatal problems, length of labor, and mother interaction
Sosa R, Kennell JH, & Klaus M, 1980, New England Journal of Medicine, vol. 303, pp. 597-600.

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