These X-rays of pregnant animals are incredibly fascinating

This article originally appeared and was published on AOL.com

Recently, an X-ray of a pregnant dog went viral — and with good reason. It’s not often we see how animals in utero look:

While ultrasounds are common for human, X-rays are typical for animals. This is because the photo is clearer, which is especially helpful because animals have more young than humans do. X-rays make it easier for veterinarians and owners to keep track.

Furthermore, while X-rays can have negative effects on animals — as they do humans — they are not performed that often.

Now that a photo of a pregnant dog X-ray rocked the Internet, one may wonder what other pregnant animal X-rays look like. Look no further: