I've never been told to do kegels by anyone :/. It pry couxld have helped a few pregnancys ago.
It has to do with the muscles that support your urethra. That is why kegels are recommended, so you still have control of your bladder after giving birth. I sneezed yesterday and peed my pants...i still do kegels, maybe i should try crunches plus kegels after this baby.