Hi, I realise I'm late to the game on this thread. I'm new to the forum and was just looking up "Provera versus Utrogestan". I find the comments here interesting. I've been on Utrogestan for a year or two (brain fog means I'm not sure!) but recently switched to Provera due to small symptoms, although I do like Utrogestan. After a couple of days on Provera, I felt awful. Horrible side effects. I've switched back to Utrogestan and feel fine. It obviously suits me. The main thing I like about it, is that it makes me drowsy, so I have it at bedtime and it helps me sleep. My GP today said that Utrogestan is a "nice, more natural" progesterone. I assume that means "body identical".