Are any ladies join in ur hubbys job insurance?

Ok , right now we have medicaid (daughters and I), hubby just got medical/health ins from his job, anyway in Jan we are all (again daughters and I) were going to join or will have it. I was wondering if I get pg and then give birth will we have to pay the hospital stay like the deliver all the things that go with having a child? I've never had anything like this, I was on medical(Cali) and on medicaid(Nv)!