KnowraEstriolLinked fromLinked fromThe 3 pages that link to Estriol, each with the reason it gives.All 3Broader topic 1Compared with 2EstrogenBroader topic: It is another major estrogen, with a distinctive pregnancy-related pattern.EstradiolCompared with: Unlike estriol, estradiol predominates as the potent estrogen during much of reproductive life.EstroneCompared with: It differs from estrone in hydroxylation, potency, and its strong association with pregnancy.