[Falling3]

Conception =/= Fertilization. The latter case you mentioned involves fertilization, not conception.

[LyndsySimon]

Your definition differs from every popular and academic source I've ever found.

Example: http://www.thefreedictionary.com/conception

"Formation of a viable zygote by the union of the male sperm and female ovum; fertilization."

[Falling3]

Farther down on that same page: "the fertilization of an ovum by a sperm in the Fallopian tube followed by implantation in the womb"