Abstract: Objective：To explore the influence of Doula instrument combined with Doula support to the primiparas′ pain perception and labor course. Methods: Conducted a program to compare differences between 20 women with Doula support (study group) and 20 women without Doula support （ｃｏｎｔｒｏｌ ｇｒｏｕｐ） from December 2013 to February 2014 in Baodi People′s Hospital in Tianjin. All 40 primiparas in accordance with inclusion criteria and exclusion criteria were divided randomly into two groups. Compared the differences in pain perception and labor course between two groups. Results: There is interaction between the using Doula instrument combined Doula support in labor and the VAS score in different stage of labor course （Finteraction=6.636, Pinteraction=0.002）. The VAS were statistically significant in different stages of labor （Ｆｔｉme=522.636, Ptime＜0.001）. The differences of VAS between study group and control group was statistically significant （Fgroups=28.903, Pgroups＜0.001）. The time of the first stage of labor in study group was shorter than in the control group （t=4.669, P=0.000）. Conclusions: Doula instrument combined Doula support is helpful to reduce the pain and shorten labor stages. It promotes natural labor in a comfortable, painless and safe situation.

Key words: Natural childbirth, Labor pain, Labor onset, Doula instrument, Doula delivery