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  1. Estrogen - Wikipedia

    Estrogen (also spelled oestrogen in British English; see spelling differences) is a category of sex hormone responsible for the development and regulation of the female reproductive system …

  2. Estrogen: Hormone, Function, Levels & Imbalances

    There are three major forms of estrogen: Estrone (E1) is the primary form of estrogen that your body makes after menopause. Estradiol (E2) is the primary form of estrogen in your body …

  3. Oestrogen - healthdirect

    Oestrogen is one of the main female sex hormones and is needed for puberty, the menstrual cycle, pregnancy, bone strength and other functions of the body. Oestrogen levels vary …

  4. Estrogen: Functions, uses, and imbalances - Medical News Today

    Apr 22, 2025 · Estrogen is a hormone that plays a role in both the male and female reproductive systems. In females, it contributes to reproductive and breast health, among other functions. …

  5. What Is Oestrogen? Its Functions, Levels, and Symptoms

    Jul 20, 2025 · Oestrogen is a category of steroid hormones that regulate bodily development and function. The three primary forms made by the body are estrone (E1), estradiol (E2), and …

  6. Estrogen: What Does It Do for the Body? - Verywell Health

    Oct 14, 2025 · Estrogen is a sex hormone produced in both the male and female human body. It impacts more areas of health than you may realize, though the focus here is on estrogen in …

  7. Estrogen | Hormone Balance, Menopause & PMS | Britannica

    4 days ago · estrogen, any of a group of hormones that primarily influence the female reproductive tract in its development, maturation, and function. There are three major …

  8. Estrogen's Effects on the Female Body - Johns Hopkins Medicine

    Estrogens are a group of hormones that play an important role in the normal sexual and reproductive development in women. They are also sex hormones. The woman's ovaries …

  9. Oestrogen 101: What it is, What it Does and How it Changes

    Jun 26, 2023 · Oestrogen—the matriarch of female sex hormones. But what exactly does it do in the body, what’s its role in the menstrual cycle and what are the symptoms to look for if your …

  10. Health Encyclopedia - University of Rochester Medical Center

    There are 3 types of estrogen: estrone, estradiol, and estriol. They affect the sexual and reproductive development in females. The ovaries make most of the estrogen in your body. …