Cats:
Duration of pregnancy: about 63-65 days (about 9 weeks).

The pregnancy process:
Mating: Cats usually mate while they are in the mating phase (estrus), which is a period of time when they are ready to become pregnant.
Fertilization: after mating, the sperm can survive in the cat's body for up to 7 days, and thus she can become pregnant even if the mating did not occur immediately.
The gestation period: during pregnancy, the cat can develop signs such as weight gain, changes in behavior (such as calmness or restlessness) and physical signs such as breast enlargement.
Signs of pregnancy:
weight gain
Increased or decreased appetite.
Changes in behavior, such as looking for a comfortable place to hatch.
The length of the abdomen can increase.

Treatment during pregnancy:
Nutrition: It is important to give the cat quality and nutritious food, especially during pregnancy and after birth.
Visits to a veterinarian: it is important to check the cat's health status and to be updated about her pregnancy.
A quiet environment: the cat must be given a quiet and safe place to litter.

Dogs:
Gestation duration: about 58–68 days (about 2 months, but this can vary depending on the breed).

The pregnancy process:
Mating: Dogs also mate during mating, which is a period of about 2-3 weeks.
Fertilization: After the mating process, the dog can become pregnant.
The pregnancy period: during pregnancy, a dog can exhibit physical and behavioral changes.
Signs of pregnancy:
weight gain
Appetite changes.
Breast enlargement and milk secretion (in late stages of pregnancy).
Behavioral changes, such as looking for a comfortable place to hatch.

Treatment during pregnancy:
Nutrition: It is important to give the dog a rich and nutritious diet, and sometimes special food is needed for pregnancy.
Veterinarian visits: It is important to monitor the pregnancy and make sure the dog is healthy.
A comfortable environment: the dog must be provided with a quiet and pleasant place to litter.
conclusion:
Pregnancy is a significant process in the lives of cats and dogs, requiring special attention and care to ensure the health of the mother and puppies. If you intend to spay your cat or dog, it is important to be aware of all the needs and treatments required during this period.