What does progesterone cause to occur in the female?

pregnancy.

progesterone causes symptoms like little bumps on your large aerola (around nipple) this will darken to a more brown color also.

I have recently had a m/c 3 wks ago and hav this symptom now, more than before i had the miscarriage. im thinking either tissue is still inside, they might have missed it on the last scan or i am pregnant again. i have been ttc since i stopped bleeding 4 days after m/c.

i have searched online for this answer and only this is only info i come across.

if anyone else knows please advise! otherwise if you find out any other cause please let me know. i will leave it til last week in jan to do pg test, if neg i will go to hosp for a scan.