Estradiol
Pronunciation: es-tra-DYE-ol
The primary and most potent form of estrogen hormone, closely monitored during fertility treatments.
Full Definition
Estradiol (E2) is the most biologically active form of estrogen, produced primarily by developing ovarian follicles. In reproductive medicine, estradiol levels are routinely monitored to assess follicular development, ovarian response to stimulation, and endometrial preparation. Rising estradiol levels indicate growing follicles, while peak levels suggest imminent ovulation. Abnormally high estradiol levels may indicate risk for ovarian hyperstimulation syndrome. Estradiol monitoring is integral to cycle management and medication dosing adjustments.
Usage
Usage note: British spelling uses 'oestradiol'; American spelling uses 'estradiol'.
In Context
- "Estradiol levels increased appropriately with follicular development." — Monitoring notes
- "Peak estradiol concentration reached 3,200 pg/mL before trigger administration." — Laboratory report