For many years now, I have been carrying out research on the benefits and drawbacks of wearing certain clothing as part of a wider research on the history of clothing (and nudity) in social situations.
One area of research I stumbled across is the subject of bra wearing and breast ptosis. The answer provided for the question in Medical Sciences How does wearing a bra affect the firmness of breasts? talks about a 15 year study by Jean-Denis Rouillon.
I found many references to this study online such as the one in Medical News Today with many different quotes on a similar vein, yet I have not been able to find a copy of this study published anywhere and no full reference information has been provided where I have seen this mentioned. E.g., Medical News Today writes:
Prof. Rouillon used a slide rule and a caliper (a device used to measure the distance between two opposite sides of an object) to carefully measure changes in breast features of hundreds of women over a 15-year period at the Centre Hospitalier Universitaire, Besançon. [...]
Rouillon found that women who never wore bras had nipples on average seven millimeters higher in relation to their shoulders each year than regular bra users.
I found information on a preliminary report (Pierrot & Rouillon, 2003) on the study, but not the 15 year study report, which I assume was published in 2017/2018 as the 2003 article was reporting on a 1 year longitudinal preliminary study, and this adds to the confusion when you consider an article written in 2013 says (emphasis mine)
According to a new French study, published on Wednesday, wearing a bra does nothing to reduce back pain, and the chest supports actually cause increased breast sagging.
After finding this report in the Skeptical Inquirer, I am now wondering if it actually exists. Does anyone have any idea of the details of the final report?
Pierrot, L., & Rouillon, J.-D. (2003). The development of the breasts after discontinuing wearing bras: Preliminary longitudinal study of 33 volunteer sportswomen. Thesis presented to Faculty of Medicine and Pharmacy, Besancon, France. Retrieved from http://www.worldcat.org/title/evolution-du-sein-apres-larret-du-port-du-soutien-gorge-etude-preliminaire-longitudinale-sur-33-sportives-volontaires/oclc/491764481