Related Experiment Video
Updated: May 6, 2026

Changes in Mammary Gland Morphology and Breast Cancer Risk in Rats
Published on: October 17, 2010
Breast form changes resulting from a certain brassière
K Ashizawa1, A Sugane, T Gunji
1Institute of Human Living Sciences, Otsuma Women's University, Tokyo, Japan.
Abstract:
Eleven adult female subjects aged 22-39 years wore a certain brassière for 3 months while anthropometry and moiré fringe photographs on the anterior trunk were taken regularly once a week. After the 3 months, the brassière was not worn for another 3 months. Then the measurements and photogrammetry were repeated for comparison using superimposed moiré configurations. The results are summarized as follows. Regardless of slim or obese trunk, subjects with pendent breasts showed the highest degree of breast form "correction" from wearing the brassière. In all subjects, after 3 months of brassière constraint, the underbust circumference was smaller but the chest circumference became enlarged, the distance between the right and left nipples became wider, and the breasts tended to hang down. This change was more marked in obese subjects with pendent breasts. And when this type of subject wore a "well-fitted" brassière for a long time, her breast form became developed; that is, her breasts hung down more.
More Related Videos
Related Concept Videos
Plastic Behavior
Temperature Dependent Deformation
Bending of Members Made of Several Materials
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Plastic Deformations
Plastic Deformations
The Mammary Glands
Each breast features a pigmented projection known as the nipple, through which milk emerges via closely spaced openings of ducts, referred to as lactiferous ducts. Surrounding the nipple is a circular pigmented area of skin named the areola, which appears rough due to...

