Sop if you were a single, pregnant mother, and were interested in another guy, would you tell him right away that you…

Sop if you were a single, pregnant mother, and were interested in another guy, would you tell him right away that you are pregnant or wait? I'm not exactly looking to have a full blown relationship right this second. But I am not against meeting someone and letting it be a friend thing for a while before I commit. Ideally if I meet someone i want to take enough time to trust them and know that they will be committed to my kids just as much as me because me and my kids are a package deal. Not to mention I'm 23 weeks and my son's father has shown the most miniscule amount of effort and interest possible so if I date someone else I would LIKE for them to be a father figure to my son. My daughter's father is still a part of her life but my son only has me for now. I don't want to throw expectations out there too soon but when it comes down to it id rather stay single than have a man who can't be a father. But I feel like that is unfair to need of someone considering anyone I date is not the actual father to my two kids.