Month after month he does this!

He knows that we are TTC. Always on fw he's not in the mood ALWAYS! He doesn't even try. Any other time he is ready for sex. This is frustrating and really turning me off. I know some of u might think he's feeling pressured...that's not the case because any other time I just ask for it he's ready to go. He says he really wants a baby with me but he's not doing his part.