Researchers captured the images for a National Geographic documentary
called 'Extraordinary Animals in the Womb'. As the Daily Mail writes
, the photos were taken "by using a combination of three-dimensional ultrasound scans, computer graphics and small cameras to document the animals’ development from conception to birth, and give an unparalleled glimpse into a world that few of us would ever expect to see."
Below is a photo of a puppy in the womb:
Here is a penguin looking snug in his egg:
A baby dolphin looks like he (or she?) is smiling for the camera:
A different video of a puppy fetus: