During the past 40 years or so, Planned Parenthood et al have redefined "conception" to mean "implantation." (Implantation is the moment, approximately 7-10 days after fertilization/conception, when the embryo attaches to the uterine wall.) By using the new, revised definition of pregnancy = implantation, the morning-after pill, RU-486, embryonic stem cell research, and early abortions are permitted because "it" is not a pregnancy and she is not pregnant. Words mean things.
I repeat: if life does not begin at fertilization, then what is that "thing" and why is it growing? If it is not life, how can it be growing?
Words mean things. We may not agree with the definition of a word, but everyone must be talking from the same definition - or they're talking past each other. (Have you and your teen ever battled over curfew because each of you understood "be home by" differently?!)