Spark when egg meets sperm seen in humans for the first time (VIDEO).

Watch the Incredible “Flash” of Conception When Sperm Meets an Egg

Watch the Incredible “Flash” of Conception When Sperm Meets an Egg

Slate in motion.
May 1 2016 7:38 AM

When Sperm Meets Egg

Watch the remarkable “flash” at the moment of fertilization.

soermzinc

Northwestern

In the video above, you can see “sparks” of conception—an incredible physical reaction when sperm meets an egg. The flashes are actually made of zinc, and their brightness could indicate the strength of fertilization.

Northwestern University researchers previously saw the reaction in mice, but this is the first time in human sperm and eggs.