Hormones
Oestradiol
Also written as Estradiol, E2.
Core panel — run every month
What it indicates
The main form of oestrogen in circulation, which varies across the menstrual cycle and across life stages.
Why a series helps
It changes across the menstrual cycle and across life stages, so a single measurement is only interpretable next to others.
What this page does not tell you
What a particular Oestradiol result means depends on you: your history, your medication, why the test was taken. Ziro does not interpret results for individuals and does not diagnose. If something in your results warrants a conversation, that conversation is with a doctor, and your results are downloadable so you can bring them.
Others in hormones
Chemical messengers that vary across the day, the month and the decades.