Although the effectiveness of the unconscious to restart the breast growth process is real, there is little media coverage which has published the results of numerous pieces of research that demonstrates it. In spite of scientific evidence on the possible influence of the mind on the body (see below for the development of neurosciences), the general opinion remains ill-informed*.
Here is a list of a few studies often published in scientific publications which are therefore peer-reviewed:
1 Scientific Research on Hypnotic Breast Enlargement 1 Peter H.C. Mutke, M.D. (UCLA) performed the first study. He presented his results as a research paper to the Department of Neuropsychiatry, University of California, Los Angeles, February 28, 1971. As of 1994, Dr Mutke was still with UCLA and has been active in the American Council of Hypnotist Examiners. 2 Williams, J.E., Stimulation of breast growth by hypnosis. His thirteen volunteers averaged 2.11 inch increase in the circumference of their breasts (2 cup sizes).

3 "The American Journal of Clinical Hypnosis," 1977, 4:201-208. 4 Willard, R. D., Breast enlargement through visual imagery and hypnosis. Dr Willard used a different technique than Dr. Williams (who used age regression and age progression) and achieved an average 1.44 inch increase in breast size for his 22 volunteers. Every woman had an increase in their breast circumference.
4 "The American Journal of Clinical Hypnosis," 1977, 4:195-200. 5 Beran, Roy (a neurologist at Adelaide Children's Hospital, England) presented the results of his study to the February 1979 National Convention of Hypnotherapists in Adelaide. Dr. Beran showed that the breast volume (he measured the breast's cubic displacement of water) more than doubled during the three month hypnosis program.
5-6 February 1979 National Convention of Hypnotherapists in Adelaide. 6 Erickson, Milton H. Breast Development
7 LeCron, Leslie M. Breast Development Through Hypnotic Suggestion. Journal of the American Society of Psychosomatic Dentistry and Medicine, 1969, 16, 58-61.
8 Elman, Dave. Elman reports in his audio recordings of trainings (1960s) he conducted for doctors that he had successfully worked with a number of women for breast enhancement. The method used was hypnoanalysis and results were typically two cup size increase.
9 Honoites. G.J. Hypnosis and Breast Enlargement--A Pilot Study, Journal of the International Society for Professional Hypnosis 6:4 (1977):8-12.
10 Body Beautiful magazine in the UK reports on the case of a 32 year old woman who uses hypnosis to go from a 32A to a 32C in a period of six months.
11 In 2002, the BBC investigated researchers at the University of California who were conducting trials on breast
Eric Kandel, Neurobiologist, Nobel Prize in Science. Columbia University
Some links on the results of scientific research on hypnosis in neuroscience :
New-York Times : This Is Your Brain Under Hypnosis
Scientific American : Scans Show How Hypnosis Affects Brain Activity
Suite 101 : Brain Research on Hypnosis
Hypnotherapy association: Brain scan shows mechanics of Hypnosis
Hypnosis and suggestion.org: Neuroimaging (brain scanning) studies of hypnosis