How does estrogen deficiency affect the uterus and breasts?

During menopause, the significant decline in estrogen production leads to physiological changes in both the uterus and the breasts.

Specifically, estrogen deficiency causes both organs to decrease in size. In the uterus, the lack of estrogen results in tissue degeneration, as the hormone is essential for building and maintaining the endometrium and stimulating uterine muscle development. Similarly, the breasts undergo atrophy due to the reduction of this hormone, which is responsible for breast growth and maintenance during a woman's reproductive years.12

These changes are part of the broader physiological transition associated with the end of a woman's reproductive life. While these effects are natural consequences of declining ovarian function, estrogen therapy is sometimes used to treat symptoms associated with this atrophy.1