Planned csection?

How does a planned c section go? Both my previous children were born befor their due date. My son 10 days early n my daughter 7 days. I also walked in at 6cm diolated with no pin or signs! I know my doc said he doesn't want me to go through contractions and chance rupturing my old     Incision. 
I'm lost how this works? Won't see the csection doc till June n we are due in July!