Evaluation of Acupuncture's Effectiveness on Pregnancy Outcomes in Women with Recurrent Implantation Failure RIF: a Large Cohort Study

"Acupuncture Therapy Before and After Embryo Transfer~This intervention consists of acupuncture sessions designed to support implantation and improve pregnancy outcomes during frozen embryo transfer (FET) cycles.~Procedure:~Acupuncture is performed using sterile, single-use needles by certified practitioners trained in reproductive health.~Sessions occur at two critical time points:~Before Embryo Transfer: A 25-minute session targeting acupoints such as Baihui (DU20), Guanyuan (CV4), and Sanyinjiao (SP6) to enhance endometrial receptivity and reduce stress.~After Embryo Transfer: A second 25-minute session targeting acupoints such as Zusanli (ST36) and Taichong (LR3) to promote implantation and relaxation.~Purpose:~Improve uterine blood flow and receptivity. Regulate hormonal balance to optimize the implantation environment. Reduce psychological stress associated with IVF procedures. This intervention is compared retrospectively to standard IVF protocols without acupuncture to asses"