There are many factors that increase a woman’s lifetime exposure to estrogen, and this exposure can contribute to the development of uterine fibroids. Here are some of the factors:
The longer a woman has her menstrual cycle, the longer estrogen levels are elevated.
Many women today are restricting how many children they are having or are not having children at all and this can increase more exposure to estrogen
Body fat produces and stores estrogen; so the more body fat a woman has, the more estrogen she will have
Xenoestrogens are found in plastics, pesticides, herbicides, synthetic hormones in both meat and dairy products, and hormone replacement therapy (HRT) including the birth control pill which contains synthetic estrogen
You have poor estrogen metabolism. Some women have a harder time with removing and metabolising excess estrogen