When did you go on Maternity Leave?

Celeste • Pregnant with baby #1 EDD April 3rd, 2016!
I work as a nurse (12 hour shifts 3 days a week). We do not get paid maternity leave so I will be going on fmla. I was planning on working up until my due date of April 3rd but I don't know how common this, especially since I work long shifts. When did you ladies quit working??