There is a God who commanded “Thou shall not kill”. His only-begotten Son, knowing our human nature and frailties all too well from his own human experience, condensed the Ten Commandments down to two, which included loving each other as He loved us - and He gave his very life for us.
Yes, the focus of Christianity is life - present and future. Life includes that which is conceived and, regrettably, may never experience true life on earth.
Had God intended to protect us from every evil, illness and misfortune, we would be posting from the Garden of Eden. We do not live in Paradise at the moment, a result of our own human weakness, but we do live to achieve the promise of eternal life renewed by the same God who banished us from Paradise, as He has now shown us the Way to return to it.
In the meantime, we focus on the precious gift of life, and learn to celebrate it ever more profoundly as we mature as Christians. This obligates us to protect life when, indeed, it has a chance to move forward to the fullness of life on earth, and hopefully beyond.