Yes, P4 affects smooth muscle. Legs, butt, tummy, makes you...
User MudOk790, in the TransBreastTimelines subreddit,
Yes, P4 affects smooth muscle. Legs, butt, tummy, makes you lose muscle mass. It reshapes along with estrogen. I highly suspect…
Nongenomic effects of progesterone on human intestinal smooth muscle cells
Overview of attention for article published in American Journal of Physiology: Gastrointestinal & Liver Physiology, August 1996