Answer:
Easy.
1. The egg is made in the ovaries, and the sperm is made in the testes.
2.the egg goes down the fallopian tube and into the uterus, while the sperm goes upwards, they most often meet in the fallopian tube.
3.if the egg is not fertilized, the egg disintegrates and the body sheds the lining in the uterus, which results in your period.
Hope this is good!