Learn about estradiol levels, their role in hormonal health, and how an estradiol blood test can diagnose imbalances. Find out normal ranges, symptoms, and treatment options. We'll walk you through typical estradiol levels at different ages and life stages, plus what to know if your levels are running a little high or low. Find out what normal estradiol levels by age should look like, how they vary by gender, and what high or low levels might mean for your health. Learn how to interpret estradiol levels in your blood test. Uncover valuable insights into overall health and well-being. Below is a general reference chart showing typical estradiol (E2) blood levels in picograms per milliliter (pg/mL) for women in different age and reproductive stages. Estradiol drives reproductive development, regulates the menstrual cycle, supports bone density, influences mood and cognition, and affects cardiovascular health. An estradiol blood test measures the E2 concentration in your serum. Normal estradiol levels by age range from around 15-350 pg/mL during peak reproductive years down to below 10 pg/mL after menopause. Estradiol (E2) is the main estrogen measured in blood tests, and knowing your number can help explain symptoms like irregular periods, hot flashes, or bone loss.