They're not allowed to ask about pregnancy, but I suggest being honest. I had a job interview while pregnant and got the job even after telling them I was pregnant and was not planning to return. Many employers value honesty. I've personally never had someone ask about time off in the future at an interview. Keep in mind you'll need a job flexible enough for you to go to your appointments still.
I was in the same situation last month, but I was about 18 weeks and showing. I didn't bring up being pregnant and they didn't ask any questions about needing time off. If I get the job, I plan on returning and would probably take 6 weeks off. My best advice would be to be honest...
I would also be honest because then you dont have to stress about telling them. Four years ago I hired a pregnant lady as her qualifications were perfect for the job. Good luck and be proud!
I would not disclose- I was in the same position and disclosed at my second interview and my friend who works there stated that it was most likely the reason I didn't get the job even tho they can't legally state that. If you get the job for all they know you may have found out late that you are pregnant and need to request time off in the he future...I tried to be honest and it never worked in my favor