Here's why:

* Egg release: The egg is released from the ovary during ovulation and enters the fallopian tube.

* Sperm travel: Sperm travel from the vagina through the cervix and uterus to reach the fallopian tubes.

* Meeting point: The fallopian tube is the meeting point where sperm encounter the egg.

* Fertilization: If a sperm successfully penetrates the egg, fertilization takes place within the fallopian tube.

The fertilized egg then travels down the fallopian tube towards the uterus, where it will implant in the lining.