1) There have been over 20 clinical trials examining the effect of acupuncture on IVF outcomes such as implantation and pregnancy rates. Most studies found acupuncture conferred an advantage, though some found no effect. 2) Meta-analyses synthesizing the results of multiple studies found that acupuncture improved IVF success in some cases, especially when chances of success were low or when compared to no treatment rather than sham needles. 3) Embryo transfer acupuncture aims to relax the patient, improve blood flow to the uterus, and reduce stress hormones through needling points related to fertility based on research findings and traditional Chinese medicine.