The reasons why cats do not give birth after 68 days of pregnancy:

1. It may be a miscalculation of the time. The cat’s due date should be 60 days from the date of mating, usually 58 days Cats that have given birth before have been born prematurely and require careful care; while cats that have given birth after 66 days may have dystocia, so it is recommended to seek veterinary help as soon as possible.

2. It may be dystocia. The average pregnancy period of cats is about 58-65 days. A few cases may be delayed to 71 days due to genetic or physical reasons. Most cats need to be wary of dystocia if they are pregnant for more than 66 days. Pay attention to the cat's physical condition at all times to see if there are any signs of labor or abnormalities. It is recommended to take the cat to the hospital for an examination to confirm the safety of the fetus, and prepare the contact information of the veterinarian in advance to avoid dystocia or other accidents.

Signs that a cat is pregnant and about to give birth:

1. The amount of activity decreases, the abdomen is obviously sagging, the breasts begin to swell, the nipples turn dark pink, and begin to secrete colostrum .

2. Fidget, start walking around, scratch the floor, increase the frequency of excretion, breathe rapidly, and start looking for a hidden place. If a delivery room is prepared for the cat, the cat will run to it. Go to the delivery room.

3. Loss of appetite or even stopping eating, and body temperature continues to drop. However, it is not recommended to measure the rectal temperature as it may harm it. You can use a pet ear thermometer or measure the armpit temperature.

4. A few hours before delivery, the uterus begins to contract. The female cat will become anxious due to labor pains, and viscous fluid will flow out of the genitals just before delivery.