1. A pregnant dog:
2. A pregnant turtle:
3. A pregnant cat:
And again:
4. A pregnant shark:
5. A pregnant snake:
6. A pregnant chinchilla:
7. A pregnant bat:
8. A pregnant guinea pig:
And again:
9. A pregnant seahorse:
10. A pregnant bearded dragon:
11. A pregnant raccoon:
12. A pregnant monkey:
13. A pregnant horse:
14. A pregnant deer:
15. A pregnant kiwi:
16. A pregnant tree skink:
CORRECTION
Thanks to everyone who has pointed out that the photo in #13 is a fake. Apparently, that is not how horses get made.
CORRECTION
The animal in #10 is a bearded dragon, not a Komodo dragon. H/T to everyone who pointed out this error.
UPDATE
An earlier version of this post included a photo, not an X-ray, of a ferret that was ill, not pregnant. It has been removed. Thanks to commenters for pointing this out.