When in the process of fertilization complete?

Fertilization is considered complete when the sperm successfully penetrates the egg, resulting in the fusion of their nuclei to form a zygote. This process typically occurs in the fallopian tubes of a female's reproductive system. Following fertilization, the zygote undergoes cell division and begins its journey toward the uterus for implantation. The formation of the zygote marks the beginning of a new organism's development.