The role of acupuncture in the management of subfertility

This comprehensive systematic review, led by researchers at the University of Hong Kong, examined the role of acupuncture in the treatment of subfertility, analyzing scientific evidence accumulated over four decades. The authors conducted a meticulous search across multiple medical databases, including both Western and Chinese literature, to evaluate the efficacy of acupuncture in different aspects of reproductive medicine. The methodology included analysis of randomized controlled trials, case studies, and case series, covering applications of acupuncture from ovulatory disorders to improvement of seminal parameters and optimization of in vitro fertilization outcomes. Proposed mechanisms for acupuncture efficacy include modulation of the hypothalamic-pituitary-ovarian axis through release of endogenous endorphins, alterations in uterine blood flow, reduction of inappropriate uterine motility, and decreased stress levels.

In terms of ovulatory disorders, particularly polycystic ovary syndrome, studies showed promising results, with improvements in ovulation rates after electroacupuncture treatment, although the authors acknowledge the need for more randomized studies for definitive validation. For male subfertility, the evidence proved to be more limited, with most studies being uncontrolled case reports or small-sample series. Even so, some studies demonstrated improvements in seminal parameters such as sperm motility, concentration, and morphology after acupuncture treatments. One area where acupuncture showed particular promise was in pain relief during oocyte retrieval for in vitro fertilization.

Several randomized studies demonstrated that acupuncture can be an effective alternative to conventional conscious sedation, especially for patients who cannot tolerate the side effects of traditional analgesic methods. The most significant finding of this review concerns the impact of acupuncture on in vitro fertilization outcomes. The meta-analysis of ten randomized studies revealed a statistically significant improvement in pregnancy rates when acupuncture was administered on the day of embryo transfer, with an odds ratio of 1.83. This effect was specific to the timing of acupuncture — when applied only on the day of oocyte retrieval, no significant benefits in pregnancy rates were observed.

The safety of acupuncture was well documented, with serious adverse events being extremely rare when performed by trained professionals with disposable needles. The most common side effects included mild pain at the needle site, fatigue, and minimal bleeding, occurring in 7-11% of cases. The review also highlighted significant variations in the acupuncture protocols used across different studies, including point selection, stimulation techniques, and treatment duration, which may explain some inconsistencies in the results. Identified limitations include heterogeneity in study designs, difficulties in establishing adequate placebo controls due to the nature of the intervention, and variations in acupuncturist experience.

The authors conclude that, although acupuncture has gained increasing popularity in the treatment of subfertility, its efficacy remains controversial in some areas. The most robust evidence supports the use of acupuncture as an adjuvant to in vitro fertilization protocols, particularly when applied on the day of embryo transfer, and as an alternative for pain relief during procedures. For future clinical application, the researchers recommend more rigorously controlled studies, standardization of treatment protocols, and more in-depth investigations of the underlying mechanisms of action.