Here's some info:
Stages of Labor.
First Stage
Uterine contractions, dilation of cervis, abdominal discomfort, panting; may last three to six hours. The dam may refuse to eat and may have loose stools or a water bag appear.
Second Stage
Expulsion of the fetal sac (water bag). This is no reason to panic. The dam may take long naps with a water bag just lying at the vulva with occasional contractions for two or three hours and still be okay. If she is pushing steadily for an hour with no results and nothing is in the vaginal canal, you should get in touch with your vet.
The pup's head or tail may be presented first. It is pefectly normal to have posterior presentation. Do not interfere too quickly. Encourage her to continue pushing. If she stops pushing and the water bag is broken and the is more than halfway out, you may want to grasp the pup with a warm wet wash cloth and apply pressure (don't pull) to encourage her to push out the rest of the pup. If that doesn't work, then it is ok to use some KYT on a sterilized gloved finger and work it around the vaginal opening while applying pressure in the direction of natural birthing.
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