The moment of conception

Some amazing pics of egg the moment it gets fertilized. The sparks are caused by zinc molecules being released by the egg.
Eggs without sufficient zinc are unable to form viable embryos.
http://www.dailymail.co.uk/sciencetech/article-2875072/Sparks-really-fly-new-life-created-Stunning-images-reveal-moment-egg-releases-billions-zinc-sparks-fertilised.html