Fanon talk:The Genesis Project/Chapter 7/@comment-5385060-20140609121228/@comment-5248145-20140609150004

Well, I am guessing that they have about 20 days left (because that has been my experience), and many of the 2nd Gen are about 7 days from becoming Adults. Even if you assume another 7 days before babys are born, there will still be about another 6 days for many of the Originals. They won't see them long, but I suspect they will see their grandsons for a few days before they die. Unless they are immortal and we just don't know it yet. ;-)

My aging is as followed:

Baby: 3 days (0 - 2 days old)

Toddler: 4 days (3 - 6 days old)

Child: 4 days (7 - 10 days old)

Teen: 7 days (11 - 17 days old)

Young Adult: 12 days (18 - 29 days old)

Adult: 29 days (30 - 59 days old)

Elder: starts at 60 days old (except for the Originals, of course)