Although an independent randomized controlled trial showed no difference between acupuncture and sham acupuncture in the treatment of polycystic ovary syndrome（PCOS）infertility，a comparison of historical data from evidence-based medicine trials shows thatacupuncture can significantly increase the live birth rate in PCOS infertility. In response to the growing infertility problem，acupuncture is likely to be a good natural fertility treatment and should be promoted accordingly. Rational analysis shows that acupuncture is a combination therapy with many influencing factors. The balloon theory can well explain the combination effect ofmultiple factors in acupuncture treatment，and quantitative effective analysis of acupuncture treatment for pain has provided precise data for various combination factors. Further understanding why acupuncture can significantly increase the live birth rate requires in-depth study of the principle of acupuncture＇s combination effect.

evidence-based acupuncture  /  PCOS infertility  /  combination acupuncture  /  soft acupuncture  /  hard acupuncture  /  pan-acupoint  /  balloon theory