Do you need a doctor's note to start maternity leave early? My job isn't physically strenuous, but is mentally taxing. I'm afraid that if I go into labor on a work day, I'll be too tired to make it through labor. Of course my boss waiting way to long to hire someone to replace me (and he hired someone without any experience whatsoever), and he's expecting that I'll work until I go into labor to train this person. I just feel like a doctor's note would help put me in a better light when I ask to go on maternity leave a week or two before my due date. I'm 37 weeks.