@Hoping43 There’s no easy answer for us.
Primarily our issue is that my husband has low motility which is why we needed IVF/ICSI. Whereas for me, at first I thought I had an ovulation issue but I don’t think that’s the case now. I ovulate monthly as IVF has shown, but I do have, and continue to have, repeated low progesterone levels, as well as other low hormones and I’m on Cyclogest three times per day. My FSH and LH are very low, my AMH is quite high for my age. Age of my eggs could be a factor in our 2 x failed IVF, I’m 39, my eggs might not be fantastic.
Additionally to that I know I have immune issues and have had all my life, so I took low dose prednisolone this cycle and maybe it made the difference, hard to say. It’s a lot of guess work unless you’re prepared to go through many expensive tests.
Oh and I also took antibiotics right before this cycle because I had a uterine and vaginal microbiome test with a clinic in Greece which showed abnormalities, so I’ve been taking good bacteria tablets since the antibiotics/throughout this cycle.
Sorry that’s probably not a very clear answer.