DISCLAIMER: Von Der Musikstadt is not a Veterinarian or health care professional. The Information I have on this website is from own personal experience or information I have found. I suggest to bring your dog to a Veterinarian that has several years experience in dealing with mange.
This is a excellent video to learn about the justration period of a growing puppy in the womb for 63 days.
I highly suggest you watching this video if you are interested in becoming a Rottweiler breeder.
4D images of puppies in a womb.
The record litter whelped was 24 puppies from a Neapolitan Mastiff
Another Cool video from Channel 4
Developing dog footage in the womb.
Rottweiler skulls, ribs, and vertebrae can be seen clearly