Educational information only. At Precursor, hormone testing is requested and reviewed by a clinician and considered alongside your history and other markers, not as a stand-alone diagnosis. Testing is performed in NATA-accredited laboratories to ISO 15189 standards.

What is oestradiol?

Oestradiol is the main and most potent form of oestrogen, the primary female sex hormone, though it is present and important in men too. It plays a central role in the menstrual cycle, reproductive health, bone strength and many other functions across the body.

Why it matters

Oestradiol is a cornerstone of reproductive and hormonal health. In women its level changes across the menstrual cycle and falls around menopause, while in men it is important for bone and other functions. Because of this, timing and context are essential to interpretation.

What your results can mean

Lower than expected

A low oestradiol can be normal at certain life stages, such as after menopause, or can reflect other factors. Its meaning depends entirely on your sex, age and where you are in your cycle.

Higher than expected

A higher oestradiol is likewise interpreted in the context of your cycle, life stage and other hormones rather than as a number on its own.

Reference ranges in Australia

Oestradiol is reported in picomoles per litre (pmol/L), and reference ranges vary dramatically by sex, age and menstrual cycle phase. For this reason, the timing of the sample is often as important as the number. Read your result against your own report and with a clinician.

Understanding your hormones with Precursor

Oestradiol only makes sense in the context of your cycle and wider hormones. At Precursor, hormone testing is requested and reviewed by a clinician, so your result is timed and read appropriately. If this is something you would like to understand, you can speak with Precursor's clinical team about whether testing is right for you.