User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-6005381-20130420085541/@comment-201.241.223.8-20130424003705

Or probably gigginox is only female, there's a lizard that only females exist and it "clone" itself (Leiolepis ngovantrii), due to the lack of male counterpart they spontaneously ovulate to "clone" themselves, and a descendant with the same ADN will be born.

Gigginox would have that system too, necause you know all of the gigginox you saw in the game lay eggs (IDK about the subspecies)