Cases of longer distances between birth dates tend to come when one baby is born prematurely due to complications, while the other is left in the womb to develop further.
Additional fun facts from the informative Twin site www.Twinpossible.com:
|Darren & Kim Rugg were born 63 |
days apart! One twin was born very prematurely
at only 25 weeks gestation, and the other’s labor was able to be
stopped, for an additional 63 days, which is rare, but possible.