If yours is not a champion dog, I'd suggest not to go ahead with mating. Mating should only be done for the betterment of the breed, and if you don't have a champion dog it is better not to mate her. There already are so many unwanted breed dogs languishing in animal shelters.
If you are a responsible, loving pet owner, you'll not like not having a control over the puppies when they go to their respective houses and not every one treats their dogs with love, and it may become traumatic for you.
And then there are several medical complications which a vet is more qualified to talk about.
I'd say, think about it long and hard before you go through with it.