I'm delivering at Highland Park Hospital and they are associated with Evanston I believe. check out northshore.org and then click on classes on the left. you can do a search for yoga. i don't start until January, but i am looking forward to the classes.
Re: Prenatal Yoga
the one i went to was Heaven Meets Earth in Evanston with Tracy. she was great... highly recommend it
https://www.heavenmeetsearthyoga.com/
Generations Yoga in Wilmette Sundays and Thursdays. www.genyoga.com