One day Bob the sperm cell and his friends entered a swimming race from Mr Jomes' testis to Mrs Jones' womb in order to fuse with the egg gamete to create a baby.
He swam up to the start line.
Ready... Steady... Swim!
Bob swam through the sperm ducts past the glands and to the penis all while overtaking his friends.
Almost as soon as he entered the vagina, he reached the cervix. By now Bob was very tired but knew that to reach the egg he couldn't stop.
Entering the womb Bob was worried, what if he was overtaken? He reached the egg and fused with it. As soon as they fused the egg released enzymes to harden the outside of the egg and make sure no other male gametes got in.
Over the weeks the unborn embryo formed into as foetus and soon was ready to be born as a formed human being.
It was a baby girl.
