How to broach the subject of ADHD with spouse

I just found this website last night. I read about three blog posts, figured out that this was what was going on in my marriage, downloaded the book and read it in three hours. I was nodding my head the whole time. I've felt so alone in my marriage of 1+ years, and I feel lucky that I found this information now.

I'm 90 percent sure that this is what is going on with my husband. I want to talk to him about it, and ask him to be evaluated. We just had a baby  two months ago, so I know it's only going to get worse with time, and that we should try to head it off now if he is diagnosed.

How did you talk to your spouse about this the first time if you were the one who suspected your spouse had ADHD? I'm afraid of making him feel bad about himself, shame, etc. and don't want that to be a turn off.

Anyone else been there and have a good strategy?

Thanks in advance.