Estrogen Levels Test
(MedlinePlus)

“An estrogen test measures the level of estrogens usually in a sample of your blood, but sometimes in urine (pee).

There are many types of estrogen, but only three types are commonly tested:

Estrone, also called E1, is the only estrogen that females continue to make after menopause. Menopause is the time after menstrual periods have stopped for a year. Males and females make estrone in the adrenal glands (glands that sit on top of each kidney), and in body fat. In females, the ovaries (the glands that contain eggs) also make estrone.
Estradiol, also called E2, is the main estrogen in nonpregnant females of childbearing age. It's mostly made in the ovaries and is important for fertility (the ability to get pregnant). It also helps support brain and bone health. Males make small amounts of this estrogen in the testicles (the glands that make sperm).
Estriol, also called E3, is an estrogen that increases during pregnancy. The placenta (the organ that grows in the uterus to provide nutrients and oxygen to the unborn baby) makes estriol. Measuring estriol levels can help monitor the health of a pregnancy and the unborn baby. Males and nonpregnant females have very low levels of this estrogen.
Estrogen levels in females normally change a lot throughout life. In males, estrogen levels change much less. But levels that stay too high or too low may be a sign of a health problem.

Other names: estradiol test, estrone (E1), estradiol (E2), estriol (E3), estrogenic hormone test

What is it used for?

In females, estradiol and/or estrone testing may be used:

To help diagnose conditions that may be caused by estrogen levels that are too high or too low, such as:
Early or late puberty
Menstrual problems or abnormal vaginal bleeding
Infertility (problems getting pregnant)
To help monitor:
Infertility treatments
Hormone replacement therapy for menopause
Hormone treatment for certain cancers, such as breast cancer
During pregnancy, an estriol hormone test may be used to:
Help diagnose certain birth defects
Monitor a high-risk pregnancy
In males, estradiol and/or estrone tests may be used to see whether too much estrogen is causing conditions, such as:
Late puberty
Breast growth (gynecomastia)
Infertility
Erectile dysfunction (ED), problems having an erection
Why do I need an estrogen test?

If you are female, you may need estrogen testing if you:

Have early or delayed puberty
Are childbearing age and have abnormal periods or no periods at all
Are having trouble getting pregnant
Have a high-risk pregnancy
Have symptoms of menopause, including hot flashes and/or night sweats
Use hormone replacement therapy after menopause
Have vaginal bleeding after menopause
Have a tumor that may be making estrogen.”

I'm glad you asked that question. I've been taking Anastrozol for 8mos now.

I decided to take hormone blocker, anastrozole every three days. So far no side effects. I will ask my doctor to check my Estradiol level on the 28th. That will be 2 weeks since I started anastrozole. Hopefully that will lower my estradiol.

Maggie,
Thank you for this information.
God Bless YOU.

Sue, I will. Thanks again.