"Then the word of the lord came unto me, saying, Before I formed thee in the belly I knew thee; and therefore though camest forth out of the womb I sanctified thee, and I ordained thee a prophet unto the nations. Then said I, Ah, Lord GOD! behold, I cannot speak: for I am a child. But the Lord said unto me, Say not, I am a child: for thou shalt go to all that I shall send thee, and whatsoever I command thee thou shalt speak. Be not afraid of their faces: for I am with thee to deliver thee, saith the Lord. Then the Lord put forth his hand, and touched my mouth. And the Lord said unto me, Behold, I have put my words in thy mouth. See, I have this day set thee over the nations and over the kingdoms, to root out, and to pull down, and to destroy, and to throw down, to build, and to plant."
Jeremiah 1: 4-10
This is a special event – the birth of a prophet. God brought the prophet Jeremiah into the world for a divine purpose, and because of that, God was planning Jeremiah’s life "before" he was even conceived. God was preparing him to do miraculous things, such as speak on behalf of God while still a child and setting him up as an overseer of nations and kingdoms. But the anti-abortionists simply overlook this on their way to claiming that the one phrase they quote proves God sees us as individual people while still in the womb. God saw Jeremiah in that way, but to claim it applies to all of us is akin to saying that we were all prepared as children to speak for God, and that God has placed all of us "over the nations and over the kingdoms" of the world. In essence, to claim this verse applies to anyone other than Jeremiah is to claim that we are all God’s divine prophets. We are not; therefore, we cannot apply these verses to our own lives.
McKinley, Brian Elroy. Why Abortion is Biblical. Elroy.net, 2003.