Estrogen ELISA kits are assays designed to detect variants of the steroid hormone estrogen, or its associated receptors. Estrogen is present in three types – estrone, estradiol, and estriol. They act as the primary sex hormones in females and play a role in the development of secondary sexual characteristics and reproductive tissues. In males, estrogens are produced in lower quantities. Estrogens are used as synthetic medication in hormone therapy and for the treatment of breast and prostate cancers. Visit the supplier page for more information about detection range and reactivity.