Normal estradiol levels vary based on age, sex, and menstrual cycle phase. For adult females, typical ranges are:

• Follicular phase: 19–140 pg/mL

• Ovulation phase: 110–410 pg/mL

• Luteal phase: 70–250 pg/mL

• Postmenopausal: <10–50 pg/mL

For adult males, a normal range is approximately 10–50 pg/mL. These values can vary depending on the laboratory and individual factors. It’s important to consult with a healthcare provider to interpret estradiol test results accurately and determine appropriate next steps.