John Calvin, the leader of the Swiss Reformation said:
“The unborn child...though enclosed in the womb of its mother, is already a human being...and should not be robbed of the life which it has not yet begun to enjoy. If it seems more horrible to kill a man in his own house than in a field, because a man's house is his place of most secure refuge, it ought surely to be deemed more atrocious to destroy an unborn child in the womb before it has come to light.”
Defense of the innocents, he argued was so integral and indistinguishable from a defense of the Gospel that believers ought to be just as willing to risk severe persecution for the one as for the other:
“Now to suffer persecution for righteousness' sake is a singular comfort. For it ought to occur to us how much honor God bestows upon us in thus furnishing us with the special badge of His soldiery. I say that not only they that labor for the defense of the Gospel, but they that in any way maintain the cause of righteousness suffer persecution for righteousness. Therefore, whether declaring God's truth against Satan's falsehoods or in taking up the protection of the good and innocent against the wrongs of the wicked, we must undergo the offenses and hatred of the world, which may imperil either our life, our fortunes, or our honor.”