When making babies the most exciting parts are conception and delivery. The interim stages can be tiresome and your baby may look more like an alien than you were hoping. Covers are not so different. I love the intitial sketch, and the final product delivers the promise. The gestation is more to do with the guts of the artistic process. Even so, it can be interesting stuff.
Here's the conception:
Here's the first trimester of the gestation period: