With my first I went back at 12 weeks. It was fine. With my second I went back at 12 weeks part time, 3 days a week. It was great, but also really necessary as she had a lot of medical complications from being a preemie, and scheduling her doc appointments and therapy appointments was like another full time job. I think you should check with the laws in your state. I am pretty sure in most states you are entitled to 3 months.