Ugh... I was hoping this would be a recommendation!!! I'm in the Piscataway area and looking for a good place too. If I find anything, I will let you know!
I haven't been there but I know of balance yoga in Woodbridge has a prenatal yoga class workshop going on right now for a month. Was going to join but work on the day they have it
Health in Motion in Westfield is where I go. It's held every Saturday from 9:30-10:30ish. The instructor is Jane DeCampo--she is great and the class is very small (2 or 3 people usually). She asks how your feeling every session and then tries to gear the stretches and movements to help. Here is the link: https://www.healthinmotion.biz/
Re: Prenatal Yoga middlesex county