User blog comment:BonesMcGee/Brainstorm: Potential savings in using the hurry hatch trick/@comment-5085023-20120923001553/@comment-5200570-20120923003556

It's just bad luck, it's all probabilities. If you want more info on the probabilites check out robins blog: http://tinyvillage.wikia.com/wiki/User_blog:RobinCarr/Virtual_Dino_Den,_Explore_How_Baby_Dinos_are_Born_in_the_Dino_Den