What is Estrogen?

definition of terms


Estrogen is a primary female sex hormone responsible for regulating the menstrual cycle and supporting the development of female secondary sex characteristics.


  • The three major types of estrogen are estradiol, estriol, and estrone. Estradiol is the predominant, most active form.
  • Estrogen is produced mainly in the ovaries, adrenal glands, and fat tissues. Levels fluctuate throughout the menstrual cycle.
  • Estrogen regulates puberty, menstruation, pregnancy, bone health, and heart health in women. It impacts mood, metabolism, and cognition.
  • Declining estrogen levels during menopause cause hot flashes, night sweats, vaginal dryness, and loss of bone density.
  • Exercise, nutrition, and lifestyle changes can help maintain healthy estrogen levels along with medical hormone therapy if needed.


  • Monthly hormonal fluctuations causing PMS symptoms.
  • Hormone replacement therapy providing estrogen to relieve menopause side effects.

Related Terms

  • Progesterone, testosterone, menstrual cycle, menopause, hormone therapy

Common Questions

  • Does exercise increase estrogen? Yes, especially intense resistance training. Body fat levels also impact estrogen.
  • How do I balance estrogen? Eat fiber-rich foods, maintain a healthy weight, and get enough sleep and exercise.

Do Not Confuse With

  • Phytoestrogens from plants that mimic estrogen in the body.
62 / 100

Thank you for reading this post, don't forget to subscribe to our free newsletter