I have given birth twice. I also did a hysto 7 years ago. The best way to avoid incontinence is practicing your "hold-muscles". Don't know the english word for it. But "holding", contracting your muscles you need to relaxe while peeing makes them stronger and you avoid leaking. Practice several times a day. Everytime you remember to do it.
I'm pre op. Don't know if it is the same after op.
Tony