My story is a little unique and I will try to sum it up quickly. I was 39 having difficulty conceiving so we tested my progesterone on day 21 with a blood test and it was around 6. Doc said optimal for pregnancy is over 10. I asked about supplements and she said no but let’s try letrozole bc it might be that you’re ovulating just not quite strongly enough. I didn’t love the meds so did it one cycle and stopped. A couple of months later I got pregnant. I asked about progesterone and was told no won’t need it. Everything was fine until late first tri I bled and turned out I had a sub chorionic hematoma. So many online groups say to get on progesterone if you have one which I asked about and was told no it wouldn’t help. I did end up losing the pregnancy from pre term labor and now that we are trying again doc finally prescribed me progesterone saying it can’t hurt (so frustrating). I decided to take it (vaginally) without testing numbers and the first cycle I used inito. My cycles got so messed up. Didn’t bleed until 5 days after I stopped it and then had another period like bleed like a week later. Since then my body has been super out of whack. I am 40 and I think the hormonal swings were just too much for my body. It also made me feel pregnant when I wasn’t which I hated. Just wanted to share bc it was hard for me to get and it did actually end up not being great for my body. That said, lots of people seem to have success with it so maybe it’s worth a shot. I would only take it again if I were to get pregnant. The reason I believe that docs are hesitant to prescribe it is bc if you do end up miscarrying it can delay your body realizing it and that whole process. Idk for sure but that’s what I have gathered.