A hydroxylated metabolite of estradiol or estrone that has a hydroxyl group at C3-beta, 16-alpha, and 17-beta position. Estriol is a major urinary estrogen. During pregnancy, large amount of estriol is produced by the placenta. Isomers with inversion of the hydroxyl group or groups are called epiestriol. Though estriol is used as part of the primarily North American phenomenon of bioidentical hormone replacement therapy, it is not approved for use by the FDA or Health Canada. It is however available in the United States by prescription filled only by compounding pharmacies. It has also been approved and marketed throughout Europe and Asia for approximately 40 years for the treatment of post-menopausal hot flashes.
Used as a test to determine the general health of an unborn fetus.
University of California Los Angeles, Los Angeles, California, United States
Georgia Regents University, Augusta, Georgia, United States
University of Utah, Salt Lake City, Utah, United States
University of Illinois at Chicago, Chicago, Illinois, United States
Harbor-UCLA Medical Center, Los Angeles, California, United States
Mayo Clinic, Rochester, Minnesota, United States
Western Institute for Biomedical Research, Salt Lake City, Utah, United States
University of Texas Southwestern, Dallas, Texas, United States
Dartmouth Medical School, Lebanon, New Hampshire, United States
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