Ok wow, I thought we we're talking about nbe?, not that I don't mind hearing what you have to say, and it seems you have plenty to talk about. (No more lurking for you). 
Shifting gears:
E1-Estrone (10-20% of circulating estrogens)
Implicated in hormone-medicated cancers.
E2-Estradiol (10-20% of circulating estrogens)
E3-Estriol (60-80% of circulating estrogens)
Thought to be anti-carcinogenic; most protective
estrogen ever tested against breast cancer.
Shifting gears:
E1-Estrone (10-20% of circulating estrogens)
Implicated in hormone-medicated cancers.
E2-Estradiol (10-20% of circulating estrogens)
E3-Estriol (60-80% of circulating estrogens)
Thought to be anti-carcinogenic; most protective
estrogen ever tested against breast cancer.