Canine ultrasound can showing gestational sacs and then focusing in on one puppy.

Canine ultrasound scan of a 39 day gestation puppy. You can clearly see the puppies front legs/paws and towards the end you will see it take a big yawn! 

Close up canine ultrasound scan of puppy, clearly showing spine, ribs and heart beating within. 

Clear canine ultrasound image scan of a Staffordshire Puppy at 6 weeks gestation, moving around in its gestational sac.