Hi, micronised progesterone raises t4 and lowers tsh slightly when taken orally if you’re on thyroxine. I’ve just been looking at papers.
https://pubmed.ncbi.nlm.nih.gov/34183565/I go very much by sleep ability and puffy or slim ankles. I used to be able to tell via bowel movements but peri has messed that up!
I’ve been on thyroxine for 20 years. There is a sweet spot with thyroxine; slightly too much thyroxine can give too much reverse t3 and swingling hypo / hyper symptoms. I’ve just reduced my thyroxine by 75 and tsh hasn’t changed, (0.2) t4 slightly (24 to 19 but I’m a lot better. Gp happy with that. Face less puffy and not crashing in the afternoons.
All hormones can vary wildly during the day, particularly t3.
Always get a test in the morning before taking thyroxine (24 hrs later).
Stop any biotin for a week before a test (b vitamin.)
I’m taking my utrogestan vaginally; if I go to continuous I may take orally but will ask for a thyroid blood test I think a couple of months after.
Being on slightly too much is really bad for bones and to me almost worse than slightly too little. I can’t be much above tsh 1 I find.
You can tweak doses very slightly but must wait for at least 8 weeks (3 months is best) before a test.