Help!!!

Ashley
Me and my husband have been trying for a child. We have two kids already (not his biologically). And I want a baby so bad with him. But he had an accident when he was four and the doctor said he was infertile. He supposedly has an child by another woman before we met but we've been together over a year and never has used protection but no baby. Help!!!! I don't know what we should do. Should we stop trying or is there something else we should try????