Issues with husband finishing?

Hey ladies! Just looking for any insight or advice. Since my husband and I met over 7 years ago, he’s always had issues finishing when we have sex. He has no problem getting hard, but most times it takes 30+ minutes, with me on top, before he can finish and even then he may not. He always apologizes but it makes me feel “lesser than” since I can’t get my husband off. Does anyone have any advice/recommendations on how to help him? We desperately want a baby and I know this will end up getting in the way of that. Please help!