Well the eggs are bigger than a beer fridge I would expect githyanki mothers are given mobility scooters after laying them. I mean the astral plane is definately wheelchair accessable. Maybe they grow new legs afterwards like a gekko? Maybe the mothers just explode leaving a few eggs behind? I would like to be in the room for the reaction when these mother are told they are carrying eggs.
But yeah it would be interesting finding out the birds and the bees....Or the frogs and the spawn in this case.