Conception occurs when a males sperm implants into a females egg. the fertilized egg is then known as

The ovaries produce the female egg cells, called the ova or oocytes. The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal hormones of the reproductive cycle.

It is less likely that the shoe will slip while someone is walking