From BlueDev (mark nelson):
Never underestimate the adaptability of
Argonians, or, more specifically, the power of the
Hist to allow Argonians to adapt.
I wouldn't expect to hear an Argonian born in
Skyrim (or on Solstheim, for that matter) mention
being hatched. Nor would I expect to hear more
transient Argonians (say, members of a small,
nomadic tribe) speak about laying eggs. However,
in warmer climates, in places with established,
stable, and permanent communities, you would
likely see a great number of eggs