I used to work in an Obs/Gynae theatre unit. Whilst there is some flexibility - you will be restricted somewhat by what days your obstetrician (or your obstetric team if you've got that kind of thing) has their elective c/s list on.

ie. I didn't have a c/s; but the Ob I chose was one I worked with and her elective c/s list (public) was on Fridays; and her private list was on Thursdays.

Just something to be aware of - and they are usually restricted themselves according to the times available in theatre; and what the booking lists are doing for that week.

HTH!