Explore 10,000+ laboratory markers, in plain English.

important female hormone

Has weak estrogen activity

considered to be the mildest and briefest-acting of the three estrogens.

Has weak estrogen activity.

Has weak estrogen activity.

Has weak estrogen activity.

Evaluation of the estrogen metabolism pathway relies on understanding several key steps of metabolism: the amount of unconjugated estrogens, hydroxylation of E1 and E2, methylation of hydroxy estrogens, and the function of key enzymes. Evaluation of the estrogen metabolism pathway relies on understanding several key steps of metabolism: the amount of unconjugated estrogens, hydroxylation of E1 and E2, methylation of hydroxy estrogens, and the function of key enzymes.

the weakest of the three major naturally-occurring estrogens in women

a weaker estrogen compared to estradiol and estrone

the weakest of the three major naturally-occurring estrogens in women

Estriol is one of three estrogen hormones. Estriol levels rise throughout pregnancy, helping to keep your uterus and unborn baby healthy. The levels are at their highest right before childbirth. They help prepare your body for labor and delivery. Everyone makes estriol. But in people who aren’t pregnant, the levels are almost undetectable. Other names for estriol include oestriol and E3. During pregnancy, estriol: - Helps your uterus grow as the fetus gets bigger. - Makes your body more sensitive to other pregnancy hormones. - Prepares your body for labor and delivery and breastfeeding. The third estrogen is known as Estriol (E3) and is produced in significant amounts during pregnancy. In men and women, Estriol is irreversibly produced by estradiol (estriol cannot make estradiol) or from estrone through 16-OH-Estrone which makes it the largest circulating estrogen because both Estrone and Estradiol can make it. Despite this, estriol is not nearly as potent as estradiol (Estradiol is 80x more potent!). The least potent of the estrogens, Estriol (E3) levels are traditionally used clinically to gauge the viability of pregnancies. In the context of this profile, estriol is least likely to be associated with high-estrogen problems (e.g. breast cancer), and is generally viewed as a "protective" estrogen. Conversion of 16alpha-hydroxyestrone to estriol is important to consider. Note: If one is taking a "Bi-Est" or "Tri-Est" preparation, an elevated estriol is not unusual. Reference Ranges: Adult Male ≤0.18 ng/mL Adult Female (Non-pregnant) ≤0.21 ng/mL Pregnancy First trimester ≤2.50 ng/mL Second trimester ≤9.60 ng/mL Third trimester ≤14.60 ng/mL References: https://www.mayocliniclabs.com/test-catalog/Clinical+and+Interpretive/81711

E3/(E1+E2)

The estrobolome is a network of over 60 genera of bacteria that can recycle or deconjugate inactivated estrogens for reabsorption into circulation by producing very powerful enzymes. This recycling process is handled by gut bacteria with beta-glucuronidase and beta-glucosidase activity. When the estrobolome is too abundant, the body is unable to efficiently eliminate estrogen, causing estrogens to build up and ultimately leading to estrogen dominance. On the other hand, if estrogen recycling (estrobolome) is too low, then this may lead to insufficient levels of estrogen in circulation.

Female hormone

Combined estrone, estradiol, and estriol measured in male serum.

Estrogen metabolite

Estrone (E1) is a significant estrogenic marker providing crucial insights into a woman's estrogen metabolism and overall hormonal balance. Estrone, primarily a product of peripheral aromatization of androstenedione, is one of the three major naturally occurring estrogens, alongside estradiol (E2) and estriol (E3). In premenopausal women, estrone levels typically fluctuate with the menstrual cycle, whereas in postmenopausal women, it becomes the predominant form of estrogen, primarily produced in adipose tissue. The measurement of urinary estrone is particularly valuable as it reflects the integrated production of this hormone over time, offering a more comprehensive picture than a single blood sample. Elevated levels of estrone can be associated with conditions like polycystic ovary syndrome (PCOS), obesity, and estrogen dominance, potentially contributing to symptoms such as irregular menstrual cycles, weight gain, mood changes, and increased risk for certain types of estrogen-sensitive cancers, like breast and endometrial cancer. Conversely, low estrone levels might indicate ovarian insufficiency, hypopituitarism, or issues with estrogen synthesis. Treatment for abnormal estrone levels typically involves addressing the underlying cause, which could include lifestyle changes like diet and exercise, management of body weight, hormonal therapies, and addressing any associated health conditions. The goal of treatment is to restore hormonal balance, alleviate symptoms, and reduce the risk of long-term health issues related to hormonal imbalance. Regular monitoring of estrone and other hormone levels is an essential component of effective management and treatment planning.