Yoga before mommyhood is competely different from yoga after mommyhood. No more running out th door to get to whatever class I can hit. No more staying at the studio after hours to get my practice in, regardess of time. These days, my yoga mat is often covered with stuffed animals and Dora blanket. Ashtanga yoga is my main practice, and I've always had a home practice, but it's getting harder and harder to fit everything in a day, and get more than five hours of sleep.
When I used to run my own business and someone would call about coming to work with my I always advised them to start with one class, rather than buying the 6 class ticket I sold. My reasoning was that I knew I was a good teacher, but there are many good teachers. (i.e. it is a necessary, but not sufficient condition) The question was was I the right teacher for that person at that time in their life. So the first thing I would suggest is: if you took a class and did not care for it, try a few others.
Yoga poses provide health to our bodies and conscious breathing integrates the mind/body connection. Asanas (poses) pronounced Ah-sahnahs strengthen, balance, stretch and relax our bodies. Depending on our needs we feel yoga poses where our bodies need the benefit. That's the wonderful thing about yoga, it helps each person - where that person needs the benefit. Consulting with an experienced yoga instructor helps when deciding which poses will, specifically, benefit you!