Anonymous wrote:Your progestrone level are elevated by the corpus luteum (the ovulated follicle) and/or implanted embryo. So if your corpus luteum finished emitting its progestrone and there IS an implanted embryo, the embryo will supply the progestrone so your level keeps elevated.

However, if corpus luteum finished its job and there is no embryo, your uterus lining sheds and you have a period, that's the end of your luteal phase.

The issue is, is there enough time in your luteal phase for the embryo to implant? I'd say 10-11 days is enough. Implantation usually takes 3-5 days after fertilization.

I think for natural conception, adding progesterone is just adding to your anxiety without too much benefit.

Again, I am not a MD and my luteal phase sometimes go as short as 7 days.

Implantation takes 6-12 days after fertilization. https://americanpregnancy.org/getting-pregnant/what-is-implantation-bleeding/

It cannot take 3-5. A day 3 embryo usually has 8 cells and needs to form a blast (usually by day 5) to implant.

I got pregnant 3 times with a 10-11 day luteal phase and no progesterone supplements. I did temp charting so I knew my cycle really well. Vitamin B6 and Vitamin C can help lengthen the luteal phase also.

I got pregnant on my own with a 10-11 day LP. It’s on the short side but not out of the ordinary. It did take 6 cycles of very closely timed intercourse though ... definitely not “just see what happens” territory.

When I tried to get pregnant the 2nd time I found that my LP was only 7-9 days and that wasn’t enough. I believe something in my hormone levels was very out of whack as I had two early CP’s a few months into trying and then the short LP issue after that, combined with ovulating very late into my cycle - so ovulation on CD20 and I would get my period on CD28-29. My OB prescribed progesterone pills to take during my LP and they worked to lengthen my LP while also, on the month we got pregnant, making me ovulate earlier in my cycle. It took 3 months. I tolerated the pills well and had minimal side effects apart from some fatigue.

My RE handed me progesterone suppositories because “they can’t hurt, maybe help” - they lengthened my cycle by several days. I wouldn’t take oral pills for the side effects, but suppositories are a lower whole-body dose.

Vitamin B6 can help as well.

This worked for me but also made me gain weight, feel exhausted, etc. hormones are a crazy thing. Try on your own first.

Your progestrone level are elevated by the corpus luteum (the ovulated follicle) and/or implanted embryo. So if your corpus luteum finished emitting its progestrone and there IS an implanted embryo, the embryo will supply the progestrone so your level keeps elevated.

However, if corpus luteum finished its job and there is no embryo, your uterus lining sheds and you have a period, that's the end of your luteal phase.

The issue is, is there enough time in your luteal phase for the embryo to implant? I'd say 10-11 days is enough. Implantation usually takes 3-5 days after fertilization.

I think for natural conception, adding progesterone is just adding to your anxiety without too much benefit.

Again, I am not a MD and my luteal phase sometimes go as short as 7 days.

For those with short luteal phase (mine is 10-11 days) - by how many days did taking progesterone pills lengthen your LP (if at all)? did you have success conceiving naturally as a result?

Trying to conceive #1 and while my RE isn’t convinced that a shortish LP is a real issue he was willing to prescribe me Prometrium