Cats are typically pregnant for about two months, with the gestation period lasting between 63 to 65 days on average. However, this can range from as short as 60 days to as long as 72 days in some cases

. The pregnancy can be divided into roughly three trimesters of about 20 days each:

• First trimester (days 1-21): Few visible signs; sometimes subtle nipple changes and slight appetite increase.
• Second trimester (days 21-42): More noticeable physical changes like a growing belly and behavioral changes such as increased calmness.
• Third trimester (days 42-63): Significant belly swelling, nipple enlargement, increased appetite, frequent grooming of the belly, and nesting behavior as the cat prepares for birth

Most cats do not show obvious signs of pregnancy until about two to three weeks in, giving owners roughly a month to prepare

. In summary, cat pregnancy lasts about 9 weeks, but can vary slightly depending on the individual cat and litter