Estriol is an estrogen, specifically an agonist of the estrogen receptors ERα and ERβ. It is a far less potent estrogen than … See more

In women who are not pregnant estriol is produced in only very small quantities, and circulating levels are barely detectable. Unlike estradiol and estrone, estriol is not synthesized in or secreted from the ovaries, and is inste… See more

Estriol is used as a medication, primarily in hormone therapy for menopausal symptoms. See more

Estriol, also known as 16α-hydroxyestradiol or as estra-1,3,5(10)-triene-3,16α,17β-triol, is a naturally occurring estrane steroid with double bonds between the C1 and C2, C3 and C4, and C5 and C10 positions and hydroxyl gr… See more

Estriol was discovered in 1930. It was isolated and purified from the urine of pregnant women by Marrian and colleagues. See more

Estriol can be measured in maternal blood or urine and can be used as a marker of fetal health and well-being. If levels of unconjugated estriol (uE3 or free estriol) are abnormally low in a pregnant woman, this may in… See more