my cat had babies

Question
my cat had a litter of 5 but i think that there is a dead one in her still i want to know if it could kill her and what i can do to help her with this and the other 5 kittens are fine and cute my cat douse not seam to care about the one still in her the kittens were born on Thursday and it is know Saturday why wont she give berth to the one in her?

Answer
Your cat needs to be taken to a vet immediately for an exam and help. You cannot help without experience with this. Also, please have her spayed as soon as the vet says she is able; breeding should be left to the professionals as problems like this and more are always possible.