But, as the author of life it is his right. He is not a murderer for murder is the unjust taking of life. Death comes to all people justly as the consequence of sin. When we make a decision at the end of life we are not deciding who lives and dies. God does that.
Christians recognize that they are stewards of resources and lives.
As such they will make decisions not as the owners of money and lives but as stewards of God. They will make decisions that reflect God's will. For that reason, as it is not the will of God for us to take a life we will not make decisions that will cause the end of life. In the Old Testament God ties two biological events together as one. Time and time again we see the Bible talking about conception and birth as a unit.