I complete the Covid Symptom Tracker every day (using the app).
It's just asked me to update my details, presumably based on the fact I am female.
It asked (don't have exact wording)
Have you ever had a period?
Are you still having periods?
How regular are those? (a few choices - I ticked every 3-5 weeks)
Are you currently taking any of the following medication?(long list from the pill to oestrogen, HRT etc).
Can anybody explain why they (the researchers) would want want details on the above?