Yesterday--in which I wrote 6,000 words, walked on the treadmill for an hour, AND baked a banana custard cream pie from scratch--I also did a lot of research on dogs and pregnancy and canine births. Yes, there are puppies in the work in progress.
I learned about water puppies, and this was new to me. The technical name is anasarca, or "walrus" puppies, and it's most common among those breeds with pushed-in noses (pugs, bulldogs, etc.)
Apparently (and this is rare, but it happens), one or two puppies can become filled with water so that they bloat in the womb and can barely fit through the birth canal. Once the umbilical cord is clipped, these puppies must be "drained" of all that water or they will literally drown. Though some of them die at birth, other water puppies have been saved by careful and attentive midwives.