I've heard many cases of women who had low progesterone during their luteal phase & with supplementation were able to successfully conceive.
I actually know that I have low progesterone yet my RE didn't suggest supplementation. I would like to look into whether I would use traditional supplementation (Crinone, etc.) or a natural cream.
Here is an article about progesterone supplementation:
Would be interested in knowing if anyone has had success with this & did you use a prescription or a natural supplement?