A Randomized Double-Blind Comparison of Real and Placebo Acupuncture in IVF Treatment
So et al. · Human Reproduction · 2009
Evidence Level
MODERATEOBJECTIVE
To compare real versus placebo acupuncture in women undergoing IVF
WHO
370 women undergoing IVF treatment, divided into two groups
DURATION
25-minute sessions before and after embryo transfer
POINTS
PC-6, SP-8, LR-3, GV-20, ST-29 (before) and ST-36, SP-6, SP-10, LI-4 (after)
🔬 Study Design
Real acupuncture
n=185
Traditional needles at specific points
Placebo acupuncture
n=185
Non-penetrating blunt needles at the same points
📊 Results in numbers
Pregnancy rate – placebo
Pregnancy rate – real
Statistical significance
Odds ratio
Percentage highlights
📊 Outcome Comparison
Overall pregnancy rate (%)
Live birth rate (%)
This study surprisingly showed that women who received 'sham' acupuncture (with needles that do not penetrate the skin) had a higher IVF pregnancy rate than those who received traditional acupuncture. This suggests that the placebo effect of acupuncture may be more powerful than previously thought.
Article summary
Plain-language narrative summary
This randomized, double-blind study conducted in Hong Kong investigated the efficacy of real versus placebo acupuncture in 370 women undergoing in vitro fertilization (IVF). The objective was to determine whether real acupuncture, applied on the day of embryo transfer, would significantly improve pregnancy rates compared with placebo acupuncture. Participants were randomized into two groups: 185 received real acupuncture with traditional needles and 185 received placebo acupuncture using Streitberger blunt needles that do not penetrate the skin. Both groups underwent two 25-minute sessions, before and after embryo transfer, using the same acupuncture points.
The selected points followed traditional Chinese medicine principles, including PC-6 (Neiguan, 內關), SP-8 (Diji, 地機), LR-3 (Taichong, 太衝), GV-20 (Baihui, 百會), and ST-29 (Guilai, 歸來) before transfer, and ST-36 (Zusanli, 足三里), SP-6 (Sanyinjiao, 三陰交), SP-10 (Xuehai, 血海), and LI-4 (Hegu, 合谷) after transfer. The study was rigorously blinded, with patients, clinical staff, and embryologists unaware of which treatment was being administered. The results surprised the scientific community: the group that received placebo acupuncture had a significantly higher pregnancy rate (55.1%) compared with the real acupuncture group (43.8%), with P = 0.038 and an odds ratio of 1.578. Although no significant differences were found in clinical pregnancy, ongoing pregnancy, and live birth rates, there was a consistent trend favoring the placebo group.
Interestingly, both groups showed significant reductions in endometrial and subendometrial vascularization, serum cortisol concentrations, and anxiety levels after treatment, with no significant differences between them. These findings suggest that placebo acupuncture is not inert and may produce measurable physiological effects. The reduction in endometrial vascularization may create a more hypoxic environment favorable to embryo implantation, while the decrease in stress and anxiety may contribute positively to IVF outcomes. The study demonstrated the safety of both interventions, with only mild to moderate side effects reported.
The findings, which contradict earlier studies showing benefits of real acupuncture, raise important questions about the mechanisms of action of acupuncture and the role of placebo effects in reproductive medicine.
Strengths
- 1Rigorous double-blind design with adequate placebo control
- 2Robust sample of 370 participants
- 3Objective assessment of physiological parameters (vascularization, cortisol)
- 4Well-standardized acupuncture protocol
Limitations
- 1Absence of a no-intervention control group
- 2No assessment of patient-reported De Qi sensation
- 3Unexpected result requires independent replication
- 4Temporal limitation in post-transfer vascular assessment
Expert Commentary
Prof. Dr. Hong Jin Pai
PhD in Sciences, University of São Paulo
▸ Clinical Relevance
The reproductive medicine setting is one of the most challenging for any adjuvant intervention: highly anxious patients, procedures with high emotional and financial costs, and binary outcomes of enormous existential weight. This work by So et al. enters this context with data that deserve attention precisely because they unsettle conventional wisdom. The pregnancy rate of 43.8% in the real acupuncture group versus 55.1% in the placebo group, with statistical significance, calls into question protocols that have been increasingly adopted in assisted reproduction clinics around the world. For the physician working at this interface, the most applicable finding is not the result itself, but what it reveals about the clinical environment of embryo transfer: the welcoming presence, therapeutic touch, reduction in anxiety, and modulation of sympathetic tone — whether or not mediated by penetrating needles — appear to influence reproductive outcomes in a measurable and physically verifiable way.
▸ Notable Findings
What makes this study particularly worthy of analysis is that both groups — real and placebo — showed significant and equivalent reductions in endometrial and subendometrial vascularization, serum cortisol levels, and anxiety scores. This demonstrates that the Streitberger needle, classically used as an inert control, did not behave as inert: it produced measurable physiological effects. The hypothesis raised by the authors that the reduction in endometrial vascularization would create a hypoxic microenvironment favorable to implantation is biologically plausible and deserves attention. Even more, the fact that the placebo group outperformed the real group suggests that the real acupuncture procedure, with its more intense somatosensory stimulation load, may have introduced a degree of discomfort or autonomic activation that marginally impaired the immediate uterine environment surrounding embryo transfer.
▸ From My Experience
In my practice over the decades, I have observed that IVF patients who present for acupuncture have a profile of autonomic hypervigilance that, in itself, already justifies the intervention. At the Pain Center, when we receive these patients referred by the reproduction team, the protocol is rarely restricted to the day of transfer — and this, in my view, is the central point that distinguishes what we do clinically from what was tested here. I usually begin follow-up at least four to six weeks before transfer, aiming to modulate the hypothalamic-pituitary-gonadal axis and reduce baseline sympathetic tone. The response to acupuncture in these patients tends to appear within the first three to four sessions in terms of sleep quality and perceived anxiety. The findings of So et al. reinforce something I observe routinely: the relational context and the session environment contribute as much as the technique itself to the therapeutic outcome.
Full original article
Read the full scientific study
Human Reproduction · 2009
DOI: 10.1093/humrep/den380
Access original articleScientific Review
Marcus Yu Bin Pai, MD, PhD
CRM-SP: 158074 | RQE: 65523 · 65524 · 655241
PhD in Health Sciences, University of São Paulo. Board-certified in Pain Medicine, Physical Medicine and Rehabilitation, and Medical Acupuncture. Scientific review and curation of every entry in this library.
Learn more about the author →Medical disclaimer: This content is for educational purposes only and does not replace consultation, diagnosis, or treatment by a qualified professional. Some information may be assisted by artificial intelligence and is subject to inaccuracies. Always consult a physician.
Content reviewed by the medical team at CEIMEC — Integrated Centre for Chinese Medicine Studies, a reference in Medical Acupuncture for over 30 years.
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