Estradiol Test

The Estradiol, E2, test measures the amount of estradiol in your blood. Estradiol is the most potent and biologically active form of estrogen and plays a central role in reproductive and hormonal health. In women, estradiol is primarily produced by the ovaries, with smaller contributions from the adrenal glands and peripheral tissues. In men, estradiol is produced through the conversion of testosterone and in smaller amounts by the testes.

There are three major forms of estrogen: estrone, estradiol, and estriol. Of these, estradiol is the most active in nonpregnant women and is the primary estrogen responsible for regulating the menstrual cycle, ovulation, and reproductive function. During pregnancy, the placenta also contributes to estrogen production. In men, small but important amounts of estradiol support bone health and sperm survival.

Estradiol levels fluctuate throughout a woman’s menstrual cycle. During the follicular phase, rising estradiol stimulates the release of luteinizing hormone, which triggers ovulation. After ovulation, estradiol works alongside progesterone to prepare the uterus for potential pregnancy. If pregnancy does not occur, estradiol levels decline and menstruation begins.

Because estradiol influences reproductive development, fertility, puberty, and hormonal balance, measuring E2 levels provides valuable insight into ovarian function, endocrine health, and certain hormone-related conditions in both women and men.

What Is Included In This Test?

This test includes:

• Measurement of Estradiol, E2, levels in the blood
• Clear numerical results for clinical interpretation

Why Does This Test Matter?

Estradiol is essential for reproductive health and overall hormonal balance. In women, it supports uterine growth, breast development, menstrual regulation, and healthy distribution of body fat. In men, small amounts help maintain bone density and reproductive function.

Abnormal estradiol levels may indicate ovarian dysfunction, infertility, menstrual irregularities, early or delayed puberty, or estrogen-producing tumors. In men, elevated estradiol may contribute to feminization symptoms, while low levels may affect bone health.

Estradiol testing is commonly used in fertility assessments, assisted reproductive treatments, and evaluations of hypogonadism. It is also valuable in monitoring hormone therapy and assessing menopausal status.

Understanding your estradiol level helps guide accurate diagnosis and supports informed decisions about reproductive and hormonal health.

Who Should Consider This Test?

You may consider this test if you:

• Have irregular or absent menstrual periods
• Are experiencing infertility
• Are undergoing fertility treatment
• Have symptoms of early or delayed puberty
• Are being evaluated for hypogonadism
• Have signs of estrogen-producing tumors
• Are monitoring menopause or postmenopausal status
• Are a male experiencing signs of feminization
• Are undergoing hormone therapy
• Want a comprehensive evaluation of estrogen levels

Convenient, No-Appointment Testing

To complete your test:

1. Order online through our website
2. Use the lab locator to find a nearby testing location
3. Walk in; no appointment required
4. Access your results securely in your HealthLabs.com account within one to three business days

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If you find the same test for a lower price from a comparable provider, contact us. We not only match the price, we beat it by an additional 10 percent of the difference.