Cats can sense that their owners are pregnant. Many pet owners say that their cats’ behavior has become more cautious after they became pregnant. There is a saying that after the owner becomes pregnant, the hormones in the body change, and the cat can sense this change. ​​​​​​

Cats’ sense of smell is much better than that of humans. There are 20 square centimeters of odor surface in a cat’s nose, but only 2 to 4 square centimeters in a human’s nose.

They also have a second "nose" - the "Jacobson's organ", which humans do not have. This is an odor analyzer that is connected to the nerves in the nasal cavity and at the same time it transmits information to the almonds Nucleus. The amygdala is a region of the brain involved in sexual, feeding, and social behaviors.

People will secrete hormones during pregnancy, which means that the smell of pregnant women will be slightly different from usual. This is a subtle change that cats can detect.

Some cats will become more intimate with their owners, spending more time rubbing against their owners and integrating with new scents. Some particularly anxious cats may become restless or even aggressive.