I didn't say it couldn't..... but she hasn't got to the 70th yet has she? And to be fair you aren't 100% about the date of the mating (if i remember that right!).

Watch her... if you think the 70th has come & gone, see how her general demeanour is. Vomiting plus smelly discoloured discharge from her lady bits (greenish, yellowish, pus-y), lethargy, are all signs to get busy and call the vet. But eating and drinking, normal energy levels, no discharge or obvious signs of sickness, are all reasons not to.

She may look a bit unwell when her labour starts - the early signs are often not very noticeable and can last for 24 hrs - she may be restless, not eat, be more affectionate or conversely not be. The movements of the kittens slow or stop as they settle in the birth canal.

I think the best thing you can do right now is not to panic overmuch at all. Cats have been doing this on their own for thousands of years, and statistically, problem births are few & far between. Just make sure you've got a vet on the end of a phone if needed.

All good wishes to her & you!

__________________
‎