Zinc protection against delayed development produced by cadmium.

The protective effect of zinc against slight teratogenical action, exerted by low cadmium concentrations, was evaluated in Bufo arenarum embryos treated simultaneously with both cations or preincubated with Zn before Cd treatment. Data on survival, malformations, and delay in development pointed out that Zn could prevent the deleterious effects of Cd in previous and simultaneous treatments with that heavy metal.