Did you tell any of your fitness instructors you were expecting?

Denise • Have a energetic, smart and sweet 2-1/2 year old that's so much fun! Been married for 11 years. On my 3rd pregnancy.
I go to the gym 3-5 days/week, but since finding out I was pregnant I have eased off a bit. No more step class. But I still want to continue other classes. Did anyone tell their fitness instructor? The ones at my gym can single you out and push you harder during class (which is great), but I don't want to overdue it.