The actions of estrogen are mediated by the estrogen receptor (ER), a dimeric nuclear protein that binds to DNA and controls gene expression. Like other steroid hormones, estrogen enters passively into …

Estrogen is a sex hormone that’s necessary for maintaining your sexual and reproductive health. Estrogen levels naturally fluctuate during different life stages and your menstrual cycle.

Apr 22, 2025 · In this article, we look at estrogen in more detail, including how it works, what happens when the levels fluctuate, and medical uses.

May 3, 2026 · Estrogen is a sex hormone that plays a key role in a female’s reproductive health. Learn what estrogen does to the body.

Estrogen levels naturally lower as you age and approach menopause. But low estrogen can also be a sign of a condition or the result of a medical treatment.

Nov 21, 2025 · Estrogen is a hormone that plays a role in sexual development, bone health, mood regulation, and more. Find out how fluctuating levels can affect you.

Jul 23, 2024 · Estrogen and testosterone are sex hormones. Estrogen is often called the female sex hormone, as it plays an important role in the female reproductive system. Likewise, testosterone is …

Oct 28, 2025 · Learn what normal estrogen levels look like between ages 40–60, how they change during perimenopause and menopause, and what affects hormone balance.

May 3, 2026 · Estrogen and progesterone are crucial hormones that regulate menstruation, fertility, and menopause. Understanding their roles and maintaining balance can help address issues like mood …

Jan 27, 2026 · Symptoms of low estrogen span from thinning hair to pain with sex. Here, doctors explain how to tell if your estrogen levels are low with age and what to do.