A pregnant cat will generally become hard because there is a fetus in its belly. In the early stages of a cat's pregnancy, when the fetus has not yet developed, the cat's belly will not become hard. However, when the cat is 30 days pregnant, the abdominal circumference increases, the fetus in the body will gradually develop, and the cat's belly will become hard, but if the cat is pregnant Pregnancy with fewer fetuses may not harden the fetus. It is best for owners to take their cats to the hospital for a pregnancy check-up when they are 30 days pregnant.

Characteristics of cat pregnancy:

1. The female cat’s estrus characteristics will slowly disappear about 3 days after mating. If mating is not successful, the cat will still have symptoms of estrus.

2. Around the 20th day of pregnancy, the color of the nipples will gradually turn pink and the breasts will enlarge. After three weeks of pregnancy, the breeder can slowly turn the cat over and carefully observe the cat’s nipples.

3. Pregnant female cats do not like to exercise, move cautiously, sleep longer, and like to sleep with their bodies stretched out. Cats in daily life prefer to lie still and do not want to move, and they do not want to play with their owners or keepers.

4. The female cat’s vulva will become enlarged and red in color, and the uterus will compress the bladder, causing frequent urination.

5. The abdomen begins to increase. At this time, you should be able to feel the fetal activity by touching the cat's abdomen with your hand, and you can hear the fetal heartbeat with a stethoscope.