Can I just take oestrogen only HRT?

[AmberOwl]

Or do you absolutely have to take combined? I'm doing some reading and am a bit stuck on this point

Thank you

If you have a womb you need the progesterone in one form or another to counteract the oestrogen thickening the lining of the womb which can be an increased risk of cancer.

Ah that's makes sense thank you. I do have periods still