I posted this link a few months ago a non clinical and sensitive to mother nature article - this is just a small part of the information it is one of the best Ive found.
Rx For Whelping and Ceasarians
http://www.thedogplace.com/library/rx.htm
Even though you know she will be surgically delivered, she should be allowed to progress far enough into labor wherein she will concentrate on licking her nipples and vulva (and everything else within reach) and ideally, her water should break. She will then become quite serious about licking and arranging her bed so that even with the interruption of a trip straight into surgery, she will be much more likely to take up where she left off upon returning home and regaining her wits. The pre-delivery licking is tremendously important as it coincides with hormonal release and lays an important foundation for the bonding behavior between mother and whelp. The first time dam who is trotted off to surgery without benefit of the nesting, licking, cleaning behavior is one who will likely never develop good mothering skills. She is more apt to reject or be frightened by those odd squirmy little things she awakens to find in her bed.
After having allowed her to perform as much of the pre-delivery pattern as is safe, insist that the veterinary surgeon save one very wet placenta. To emphasize the importance of the request, as you gather the bitch, receiving box, blanket, (and of course, your credit card!) be sure to toss in a zip lock freezer bag. If you have reason to believe the round trip will take more than three hours, refrigerate the placenta, otherwise, your very important nursery tool will keep quite nicely.
Upon returning home, settle the bitch and pups and hope she will take notice of them. You can try rubbing them across her vulva but my advice is to take no chances. Prepare the placenta by placing the plastic bag in hot water. When she is alert enough to respond to you, dip the pup’s rear quarters into the bag, then dump the whole mess under her tail as you discreetly place the pups at her rear.
If she was plucked from the nest in the midst of cleaning herself (accompanied by the release of endorphins), her reaction now should be classic. She feels the same pain as before surgery, and she associates it not with the whelps but with licking, cleaning, and satisfaction. So what will she do? Sniff at the mess you’ve quietly made, then clean herself, then with no hovering interference and no break in concentration, she’ll begin to lick her messy whelps. You can now sit back, relax, and admire motherhood functioning as nature intended.