: Plastic surgery research often cites a 45:55 ratio as a standard for a natural look, where 45% of the breast volume is above the nipple and 55% is below Jones Plastic Surgery . Changes with Aging
Biologically, mature adult breasts (Tanner Stage 5) are characterized by the following Johns Hopkins Medicine :
: Only the nipple remains raised above the surface of the breast.
: Milk-producing glands shrink, and the breast tissue becomes more fatty and less dense Michigan Cosmetic Surgery .
: Ligaments (Cooper's ligaments) stretch over time, leading to an elongated or flattened appearance.
: Nipples may point downward, and the areola may become smaller or nearly disappear MedlinePlus . Health Monitoring & Documentation
Medical reports and self-examinations focus on identifying deviations from a person's "normal" mature breast state.