From Creatures Wikia
Pregy Candy is a food made by Norngirl and Razgriz for Creatures 3 and Docking Station that helps female creatures with stuck pregnancies lay their eggs. Norngirl did the sprites and sounds and Razgriz made the code. You can get it at Norngirl's temporary storage place. The candy that the Pregy Candy box comes in is full of starch, protein, fat, pregnancy chemical as well the lay egg code that helps the female creature with the stuck pregnancy lay her egg. The pregnancy chemicals make any non-pregnant creature who eats the candy get a fat belly.