Estradiol is a female sex hormone that fluctuates in concentration and can be used as a good indicator of fertility problems or changes to a woman's menstrual cycle. Structure, properties, spectra, suppliers and links for: β-Estradiol, Estradiol, 50-28-2, Estradiolum. Your doctor may order an estradiol test if female or male sex characteristics aren’t developing at the normal rate. An estradiol level that’s higher than normal indicates that puberty is. Estradiol (E2), also spelled oestradiol, is an estrogen steroid hormone and the major female sex hormone. It is involved in the regulation of the estrous and menstrual female reproductive cycles. Much of estradiol is bound to proteins. The unbound portion and estradiol bound to proteins with low affinity reflect the free concentration. The free estradiol may better correlate with medical conditions than the total estradiol concentrations. User Reviews for Estradiol. Also known as: Alora, Climara, Estradiol Patch, Menostar, Minivelle, Vivelle-Dot. The following information is NOT intended to endorse drugs or recommend therapy. Find patient medical information for Estradiol Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Eigenschaften. Bei Frauen wird die größte Menge des Estradiols von Granulosazellen der Eierstöcke produziert. Über die Zwischenstufe Androstendion wird in den Theca-folliculi-Zellen der Vorläufer Estron gebildet. Clinical Significance. Measuring the circulating levels of estradiol is important for assessing the ovarian function and monitoring follicular development for assisted reproduction protocols. Describes how estrogen (estrone, estradiol, estriol) tests are used, when estrogen tests are ordered, and what the results of an estrogens test might mean.