
I'm sorry for what has happened with your girl.
My girl was scanned at 6 + puppies(stopped counting then) all seen very clearly and seemed well.
By the time she gave birth there were only 4 so she had reabsorbed the rest.
She was growing steadily and then just seemed to stop, I thought I was being silly thinking that but when there were only 4 babies I knew I was right she did obviously slow down the growth as she lost some of the pups :(.
I know of few cases where bitch has lost the litter and this has caused a PYO so I'm not sure how the vet knows there were never any pups if they were reabsorbed.