They were dead. 3 of them, perfectly formed, no tangled umbilical, nothing looked wrong. Most of the yolk was unabsorbed. They looked like they'd been dead for a long time, so I don't think it had to do with me cutting them. They were all slimey and practically falling apart. All male normals coincidentally. I'm so upset. I hope to high heaven the others aren't dead as well. What did I do wrong?