Patients and methods
PPH
This study was an investigator blinded randomized pilot study. Since the lack of objective, prospective studies on the effects of EA at Baliao point on patients after PPH, the actual sample size calculations could not be performed. And this study was conducted in accordance with the ethical, moral, and scientific principles stipulated in the Helsinki Declaration and Guideline for good clinical practice. In addition, this study was approved and registered by the Chinese Clinical Trial Center, Registration number: ChiCTR2100043519, Registration time: February 21, 2021.