And also, don't forget that blood transfusion will give you a whole new personality:
The poisons that produce the impulse to commit suicide, murder, or steal are in the blood." And Dr. Amrico Valrio, Brazilian doctor and surgeon for over forty years, agrees. "Moral insanity, sexual perversions, repression, inferiority complexes, petty crimes -- these often follow in the wake of blood transfusion," he says. - The Watchtower, Sept. 15, 1961, p. 564
And your children will be stillborn:
"Lifesaving efforts by unscriptural means can never produce results of lasting good. How foolish it is to think that one can save life by violating the laws of the Life-giver! While it may produce seemingly beneficial results at the moment, it may ultimately take its toll in disease and stillborn children as a direct result of such an ill-advised course. Even if no physical harm results to the patient or to ones offspring, violation of the law of God seriously jeopardizes one's opportunity to gain eternal life in God's new world." - The Watchtower, Sept. 15, 1961, p. 565
The old bible writers didn't have any idea of what the bood really was. They thought that blood was the life itself.
And WTBTS are still in the dark here. They can't understand that the whole bible isn't inpired, just look at Genesis 1:1-3, the biblewriters didn't at that time, knew the nature of ligtht. You can't blame them for that, but it also proves that they weren't inspired.