How to know if a cat is pregnant

Generally cats need to remember the time of mating after the mating period in heat. The most accurate way is 28-30 days after mating, when an ultrasound can be taken to see if there is a foetal sac in the uterus, and secondly, an X-ray can be taken at 42-45 days of pregnancy to see the bones and number of cats. There are also some cats that increase their food intake after mating, their abdominal circumference becomes larger day by day, their nipples become red and they experience pregnancy vomiting.