Intermediate
Technical
In the Industry Vocabulary Test
Estradiol
Pronunciation: es-tra-DYE-ole
The primary estrogen hormone monitored during ovarian stimulation cycles to assess follicular development.
Full Definition
Estradiol (E2) is the most potent naturally occurring estrogen and a key biomarker in assisted reproduction. Produced by developing follicles, estradiol levels correlate with follicular growth and are monitored throughout stimulation cycles to guide medication dosing and timing. Rising estradiol levels indicate follicular response, while extremely high levels may predict ovarian hyperstimulation syndrome risk. Normal ranges vary by cycle phase and individual patient characteristics, requiring careful interpretation by fertility specialists.
Usage
Usage note: Commonly abbreviated as E2 in medical records.
In Context
- "Estradiol levels rose appropriately from 125 to 2,847 pg/mL during stimulation." — Monitoring report
- "The trigger was administered when estradiol reached 3,200 pg/mL with adequate follicle development." — Treatment protocol
Also known as
E2
17β-estradiol
Don't confuse with
estrone
estriol