Estriol Free E3 LIS Code: E3

What is Estriol (E3)?

Estriol (E3) is one of the three primary biologically active estrogens in the human body, alongside estrone (E1) and estradiol (E2). Estrogens are essential hormones responsible for the development and regulation of secondary female sex characteristics and reproductive function.

Estriol Production During Pregnancy

During pregnancy, estriol is predominantly produced by the placenta. Its levels steadily increase throughout gestation and reach their highest point just before labour and delivery. Monitoring estriol levels in pregnant women can provide insights into foetal health and placental function.

Estriol in Non-Pregnant Women

Although estriol is most abundant during pregnancy, it can also be produced in smaller quantities by the ovaries and adrenal glands in non-pregnant women. While its levels are lower compared to other estrogens, it still plays a role in maintaining overall hormonal balance.

Clinical Relevance of Estriol Testing

Estriol testing is particularly useful in:

Monitoring pregnancy progression

Assessing foetal well-being

Evaluating placental function

Understanding hormonal status in non-pregnant women when investigating estrogen-related symptoms

Estriol Hormone Testing in Slough

For women in Slough and surrounding Berkshire areas, estriol hormone testing is available through local clinics offering comprehensive reproductive and pregnancy health assessments. Whether you're undergoing prenatal care or exploring hormone-related symptoms, estriol testing in Slough supports accurate diagnosis and personalised care.