Fiona, both options are nil by mouth. The gel is transdermal and the Utrogestan is used vaginally. This is the most flexible option and similar to my regime which is one pump of Oestrogel and 50mg progesterone every day. You can use 100mg Utrogestan every other day which would obviously equate to 50mg every day.
Evorel patches contain a synthetic progesterone but you might want to start with them and see how you get on. I found they didn't stick properly and I never managed to get enough oestrogen out of them.