2Wolman WL,Chalmers B Hofmeyr GJ et al.Postpartum depressionand companionship in the clinical birth environment: a randomized,controlled study[].American Journal of Obstetrics and Gynecology.
3Trotter C,Wolman W,Hofmeyr GJ et al.The effect of socialsupport during labour on Postpartum depression[].South African Medical Journal.1992
4Klaus MH.Kennell JH,Robertson SS,et al.Effects of social support during parturition on maternal and infant morbidity[].British Medical Journal.1986
5Bertsch TD,Nagashima-Uhalen L,Dykeman S et al.Labor support by first-time father: direct of bservations with a comparisonto experienced doulas[].Journal of Psychosomatic Obstetrics and Gynecology.1990
6Ivwig LM,Ingle RF.Childhood mortality rates, infant feeding anduse of health services in rural Transkei[].South African Medical Journal.1984
4Anon. The state of the world's midwifery[EB/OL].[2014-3-27].http://www. unfpa, org/sowmy/resources/ docs/main_report/en_SOWMR Full. pdf.
5Morro S, Cerutti F, Mistrangelo E, et al. Outcomes of the first midwife-led birth centre in Italy,5 years~ expe- rience[J]. Arch Gynecol Obstet, 2007,276 (4) : 3aa-aaT.
6Homer C S,Davis G K, Brodie P M, et al.Collaboration in maternity care:a randomized controlled trial compa- ring community-based continuity of care with standard hospital care[J~.BJOG,2001,108(1) :16-22.
7Helen V B,Joyee E T.Genealogic origins of nurse-mid- wifery education programs in the United StatesEJ~.Mid- wifery Women Health, 2003,48 (1) : 464-472.
8WHO. World Health Statistics, 2007 [EB/OL]. E2014-3- 27 3. http://www, who. int/gho/publications/world _ health_statistics/whostat2007, pdf? ua=l.
9Phillips B, Rubeck R, Hathaway M, et al. Preventive medicine:What do future practitioners really need? Are they getting it inmedical school[J].J Ky Med Assoc, 1993,91(3) :104-111.
10Luyben A G, Wijnen H A, Oblasser C,et al.The cur- rent state of midwifery and development of midwifery research in four European countries [J]. Midwifery, 2013,29(5) :417-424.