In a science class (Biology) we got to talking about birth methods of animals and mammals. (YES- 65, retired and back to college)
Some (like humans) have a umbilical cord which needs to be cut (or severed) and sealed and others do not.
Is there any way of defining which group animals and mammals belong to, in regards to this method of birth and apart from being 'In the wild', where no facilities exist, are there any advantages / disadvantages?.
From memory, Mammals (with a few exceptions) have live, "umbilical" births and suckle their young and are warm bloodied and mostly hairy.. A few mammals are egg layers - Echidnas, Duck billed platypus to name two - I assume they do not have umbilical chords..