1. Health
You can opt-out at any time. Please refer to our privacy policy for contact information.



Updated August 09, 2010

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.

Definition: Estradiol is the form of estrogen produced by the ovary, and is what is measured during routine infertility monitoring. Your estradiol level should start low (under 60ng) at the beginning of your menstrual cycle, rise to about 200ng to 250ng per mature follicle, and then fall again around ovulation. Estradiol levels will then begin to rise again as the empty egg follicle begins to secrete estrogen and progesterone.
Also Known As: estrogen e2
Common Misspellings: estrodial
  1. About.com
  2. Health
  3. PCOS
  4. Biology 101
  5. Estradiol - What is Estradiol

©2014 About.com. All rights reserved.

We comply with the HONcode standard
for trustworthy health
information: verify here.