Kindai University Apr 18 2025 1. Overview The research team discovered that glassware used to manipulate and culture fertilized eggs in the fields of assisted reproductive technology (ART), livestock farming, and basic research contains toxic substances that interfere with the development of fertilized eggs (embryos). The team also identified the toxic substance as zinc, and developed a method to counter it by closely analyzing its effects on mouse, cow, and human fertilized eggs. The results