Welcome to HCM.
Gluten intolerence itself doesn't cause infertility
, but can cause reduced ovarian reserve
sometimes. If you stick to gluten free
diet, it has no impact on fertility. At the age of 41 female fertility naturally declines because of declining ovarian reserve. You can improve it to some extent by taking DHEA tablets 25mg thrice daily in consultation with your physician.
Regarding ways to improve partner's fertility, it can be done by taking diet rich in antioxidants, avoiding/reducing smoking
& alcohol intake. Also he can avoid prplonged sitting/standing, take local cold watet bath.
The treatment giving highest chance of pregnancy
is IVF/ICSI. You can go for it if acceptable to you.
Wish you good health.