Can varicocele cause infertility in men?

Can varicocele cause infertility in men? My hubby has this condition and it is worrying me a lot. I am very unsure of our ability to conceive. Sometimes she may end up succumbing to pain at our time of conception. I would ask him to stop and I would desperately feel for him. Will I ever get pregnant now? That is a question that disturbs me a lot as I could not dare cheat my husband. He was too desperate to get his own child too. I had to take a huge step forward and take him to the hospital for further treatment. The testicles were so small in size with a slight swelling. Nothing could shed some light on his ability to help in conception. Aware of all that, the long journey for the necessary procedure to have kids started. It was a tiring journey before we arrived at a consensus. The hospitals in our environment were not well equipped with the necessary equipment for the enhancements of my husband to have the ability to fertilize. So, the next option was to see a specialized doctor for the correct guidance. And we met one. From her report, the only thing we could do was myself going for sperm donation. My hubby had no objection and we decided to go for it. It took us months after months before we learnt of BioTex clinic and that is why we had a final sigh of relief. I am now blessed with a cute baby boy.