It DOES make a difference which wins the race: Scientists scan 100 sperm from…
A human sperm encounters an egg, seen via electron microscope National Geographic image by David Phillips, Visuals Unlimited
This image is of a purple, colour-enhanced human egg sitting on a pin. The egg is coated with the zona pellicuda, a glycoprotein that protects the egg but also helps to trap and bind sperm. Two coronal cells are attached to the zona pellicuda.