if its a first time berry she's gonna drop eggs because the female is new to this. It's like rollerblading or snowboarding for the first time you're gonna fall.
drops can occur via stress, poor water quality an llet's hope this doesn't happen... molting
from my experience, my female blue velvet died because she was berried and molted so then the molt got stuck to her. *The berries are stuck to the female's shell with this adhesive the female produces to keep the eggs on. *