Question to those ladies who has had 4 c-sections

How long did you wait to have your 4th baby and what did the doctor say regarding it being a 4th c-section? I have 3 c-sections and i would like to try for my 4th and final baby 2 years from now. I have an appt with my doctor this week and i will ask how long he recommends me to wait before trying. Just wondering what you ladies have been told.