Does excess progesterone convert to estrogen or cortisol?

Ovarian progesterone. Progesterone (ovarian) and dhea are the precursors for more specialized steroid hormones, including cortisol, aldosterone, estrogen and testosterone. Taking synthetic progesterone,  progestin, will not increase the level of these hormones. In fact, Progesterone opposes their toxic effects.
Not really. Cholesterol is the first in line which becomes pregnenolone. This molecule becomes progesterone which via enzymes becomes forms of testosterone and cortisol. This isn’t true with synthetic progesterone tho. Your body will make whatvit needs in each cell. .

Related Questions

With isolated adrenal insufficiency likely due to LH and crest with digital ischemia, is estrogen/progesterone supplement needed to protect bones (estradiol < 20) given daily cortisol supp of 20-30mg?

See below. If you are corticosteriods for a long period of time, you do need to be medications to protect your bones. Besides hormones, you could go a class of drugs known as bisphosphonates. Talk to your doctor about your options. Read more...
To many factors to. Be answered easily on the internet. Check w/your doctors. There are varying opinions on estrogen replacement make sure you're on appropriate calcium and vitamin d. A bisphosphonate may also be considered if indicated to preserve bone mass. Have you had a baseline dexa? Read more...