The sperm into the egg will leave tails, discard. Then mix with the egg becomes a single cell. Called a Zygote (Zygote) Masai gate is rapidly dividing and growing into a fetus in most.
To release sperm into the egg, leaving a tail. Then mix the egg into a single cell called a zygote (Zygote) later this Gate to divide rapidly. And growth in the fetus.
The sperm into the egg to release the tail away. And mix with egg becomes a single cell called a zygote (Zygote), then the gate will break the fast. And the growing fetus finally.