You don't need to say anything, of course, everybody can see

that you are very pregnant. You can ask them when they would like to start the work. If you were hired, what would be your plan to back to work (if you really have a plan)? 6 weeks? 6 months?

They can't ask about your pregancy, but they can rule you out thinking of this woman can stay home for a year. To me, you still stand a chance to get the job if you keep it open.

Having a baby changes a lot. Think twice about work and family. Don't lie to hiring people. Good luck.