Estradiol(E2)
hormoneDefinition
The primary form of estrogen produced by the ovaries, particularly by growing follicles.
In IVF Treatment
E2 is measured frequently during ovarian stimulation to monitor follicle growth. Each mature follicle typically contributes 150-300 pg/mL to the total E2 level. Very high levels can indicate risk of OHSS.
Frequently Asked Questions
What is a good E2 level during IVF stimulation?
E2 rises as follicles grow, typically 150-300 pg/mL per mature follicle. Your doctor will assess your total E2 in the context of your follicle count and size rather than a single target number.