Originally Posted by
Jelisej
Not sure, as interaction between them is quite complex- and thyroid hormones and progesterone are quite connected people with low thyroid hormones usually have low progesterone levels- increasing thyroid hormones should also increase progesterone "production" but there are many other situations,
so one thing that is sure is adding thyroid would make better use of progesterone, as it would convert more readily and all hormones would "cascade" better, and would be less aromatisation etc...