Oestradiol

The main oestrogen in both women and men. In men it is made by converting testosterone, and it is read alongside testosterone rather than on its own.

Oestradiol in the Biomarker Guide — what it is, why it is tested, and what moves the number.

Add-on markers can only be added to venous samples.

Timing

Cycle day matters: days 2–5 is standard.

Turnaround: the lab reports this test within 24 hours of receiving your sample, counted in working days. Most samples reach them within about 3 days of posting. Full detail on our Turnaround Times page.

We do not interpret results. Not medical advice or a diagnosis.