Understanding the anatomical structure of the pregnant cat’s uterus helps us understand the entire process of newborn delivery.

The cat’s uterus is distributed in the shape of a horn in its body. The picture below is a top view. The relative positions of the ovaries, uterine horns, uterus, cervix and vagina are relatively clearly displayed.

▲ Schematic diagram of the uterus from above

The picture below shows what a unilateral uterine horn looks like when you are pregnant with a kitten. The diagram shows the approximate location of the ovaries, fallopian tubes, uterus and developing kitten.

▲ Schematic diagram of unilateral uterine horn and fetus

Kittens in the horns close to the ovary may grow smaller than kittens further away, especially if there are a large number of kittens in a single litter.

In addition, during general delivery, the time interval between the birth of the first and second kittens is relatively short, and the third and fourth kittens wait. The reason is that kittens are generally delivered in pairs. After one comes out of one uterine horn, the other one will be born. Another one came out of the palace corner.

The remaining 3 and 4 require a period of time to “move” around the cervix to give birth smoothly, which is why there may be a long time between 2 and 3.