Related Experiment Video
Updated: Sep 20, 2025

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design
Published on: May 31, 2021
Promoting women's genital self-image with vulva photographs and information about genital appearance and function: an
Stefanie Gonin-Spahni1, Maria Schmuki1, Lucca M Brandner1
1Department of Health Psychology and Behavioral Medicine, Institute of Psychology, University of Bern, Berne, Switzerland.
Background:
Women with more negative genital self-image are more likely to experience sexual dysfunction, less likely to protect themselves from sexually transmitted infections and unwanted pregnancy, and more likely to consider labiaplasty.
Aim:
This study investigates whether women's genital self-image can be promoted via exposure to natural vulva diversity and information about genital appearance and function.
Methods:
An online experiment was conducted as a two-arm randomized controlled trial including a vulva photographs only, photographs and information, and a control condition. Participants were 563 women aged 18-68 years (M = 27.6, SD = 8.3).
Outcomes:
The primary outcome was the Genital Self-Image Scale; secondary outcomes included the Female Sexual Function Index, sexual health behavior, and interest in genital plastic surgery.
Results:
Results indicated a significant main effect of time. Genital self-image increased significantly in all conditions immediately after the intervention (all p < .01, all partial η2 ≥ .03). In the group with vulva photographs, this increase remained stable at 2-week follow-up (p < .05, partial η2 = .02). Only women in the vulva photographs and information group showed a significantly more positive genital self-image at 8-week follow-up (p < .01, partial η2 = .05). Confirming the experimental effect, we found a significant group x time interaction (p < .001, partial η2 = .015). Planned contrasts indicated a significant group difference in genital self-image in the intervention groups vs. controls immediately after the intervention (p < .01, d = .53) and at the 2-week follow-up (p = .042, d = .41). No group differences were found at the 8-week follow-up (p < .60). The combined condition of photographs with information was not superior to photographs only at any time point. There were no effects on secondary outcomes (all p > .20).
Clinical Translation:
The results underscore that women's genital self-image can be improved rapidly and cost-effectively with education.
Strengths & Limitations:
This study is the first to examine the changeability of genital self-image in a large convenience sample using an experimental design. The intervention effect could only be shown in the short term. However, the effect was particularly impressive given that women's genital self-image was relatively positive prior to the intervention. The results may not generalize to women with a less positive genital self-image or those considering labiaplasty.
Conclusion:
Exposure to photographs of natural vulvas with or without information about genital diversity and function is a useful tool for improving genital self-image in adult women, potentially benefiting sexual health and well-being.
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