Hi yes they do seem to look differant week to week, and co's she near end the pup will have moved down near vulva, so she will take on a new shape , keep your eyes on her keep your cool hope all go's well for you and your bitch , my girl has just had a phantom, so i am a bit gutted and ive got the flu i feel like crap ,enjoy your pups to be good luck warm regards debbie.