As we know,One of the most commonly used acupuncture points used for gynecological, fertility, digestive, urinary, sexual and emotional disorders is SanYinJiao, or Spleen 6. Its name translates into English as Three Yin Intersection, reflective of it being a meeting point of the three yin channels of the leg (Spleen, Liver and Kidney). One needle; three meridians.SanYinJiao is classified as one of the “forbidden points”, since it is contra-indicated to use during pregnancy because of its influence on the musculature of the uterus.

To observe the impacts of electroacupuncture (EA) at Sanyinjiao (SP 6) on labor and assess its safety,Chinese beijing Meitan General Hospital has done a research about this.The random and single-blind method was adopted to divide 111 cases of the puerperas of natural delivery into an EA group (38 cases), a sham-acupuncture group (37 cases) and a blank control group (36 cases).

Their conclusion is that electro-acupuncture EA at Sanyinjiao (SP 6) can shorten the duration of the active phase of the 1st labor stage. It is safe for either the puerpera or the fetus and can assist the parturition quality in clinic.
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Reference:Liu YL, Jin ZG .Zhongguo Zhen Jiu. 2012 May;32(5):409-12.