Hi, thanks for the replies.
My husband seems to have become infertile due to the severity of his illness and the effect that this has had on his general health. He's lost over 4 stone and has become so severely anaemic that he has had to have an emergency blood transfusion.
We have only been able to find one study suggesting that the effects of aziathoprine maybe detrimental to a foetus but that has caused us (& our gynae/ob) concern as we have already lost one child 7 years ago and don't want to go through that again. We have now been trying to conceive, unsuccessfullly, for 2 years so have now been referred for IVF. We are freezing some sperm this week, prior to him starting on the aziathoprine but we cannt afford to have recurrent IVf if this one attempt on the NHS doesn't work. Therefore we'll go back to trying naturally with the hope that the aziathoprine won't have a detrimental effect. Any 'happy ending' stories would be much appreciated as we feel in a very dark place at the moment.