Hi Camilla and welcome to the TCS Pregnant Cats and Kitten Care forum. We are so glad you found us here!
A couple of things to look out for with Mom ...
Make sure she is taking proper care of the kittens, nursing them freely and willingly, grooming them, etc. A queen that doesn't take care of her kittens is a sure sign something is wrong. Also, she will bleed a little bit for a few days - it should only be a drop or two (but as I always say, when it is blood, no matter how little an amount, it looks huge!) and it should subside no later than 10 days after delivery. If she is bleeding large amounts or if she begins discharging anything other than a little bit of blood, it's time for the vet. Place her litter and food/water in the same room with the nest, but far enough away from it to ensure she won't move the kittens and far enough away from each other that she won't refuse to eat or potty normally.
As for the kittens, you want to see fat, round, taut little bellies. When they are not getting enough to eat, the skin across the belly will get saggy and wrinkled looking. It is also suggested that you get a daily weight for each of the babies and chart it to observe progress. While others may not feel it is necessary to do this, I have found that it may help to catch a failing kitten a little faster so you can intervene.
The umbilical stump should dry up and fall off within several days. You will also begin to see their little eyes opening within a few days as well. Once the eyes start to open, watch out for eye goopies - here is a good article on what to watch out for with that:http://www.thecatsite.com/forums/showthread.php?t=54375
When you can, I hope you will post some pictures of your babies here so we can enjoy them along with you. If you take pictures, please remember that little eyes are still in the early stages of development and a flash isn't the best thing for them in close up facial shots. Try to get a good, sunny day and forego the flash, but if you have to use a flash, tape a couple of thicknesses of tissue over the flash unit to diffuse the light.
Here is a good link for determining the genders:http://www.vetmed.wsu.edu/clientED/kittenSex.asp
Again, welcome to TCS. We look forward to hearing more about you and your kitties!