The Bible says, "You saw me before I was born and scheduled each day of my life before I began to breathe. Every day was recorded in your book!" Psalm 139:16 (...) If the concept of "God's plan" is true, you can first of all see that God wants us to be aborting children. Every single abortion is planned by God, so God must be doing it for a reason. Second, you can see that both the mother who requests the abortion and the doctor who performs it are blameless. Since it is God who planned the abortion of the child (God chose the "exact time" of the death, according to Rick Warren), the mother and doctor are simply puppets who are fulfilling God's plan, are they not? What about all the Christians who are fighting against abortion? If abortion is part of God's plan, why are they fighting it? God is the all-powerful ruler of the universe, and his plan is for more than a million children a year to die in the United States through abortion. 
The Religious Right would probably be shocked to hear that God might do abortions, albeit without the mother's consent. Still God kills fetuses before birth or kills children after birth, the text isn't clear in most cases.
"As for [the tribe of] Ephraim, their glory shall fly away like a bird, from the birth, and from the womb, and from the conception. Though they bring up their children, yet will I bereave them, that there shall not be a man left: yea, woe also to them when I depart from them! Ephraim, as I saw Tyrus, is planted in a pleasant place: but Ephraim shall bring forth his children to the murderer. 
"Give them, O LORD: what wilt thou give? give them a miscarrying womb and dry breasts.  This is from a prophet, presumably righteous.
"Ephraim is smitten, their root is dried up, they shall bear no fruit: yea, though they bring forth, yet will I slay even the beloved fruit of their womb.' Hosea 9:11-19, KJV}}
"Samaria shall become desolate; for she hath rebelled against her God: they shall fall by the sword: their infants shall be dashed in pieces, and their women with child shall be ripped up.' Hosea 13:16 This text clearly states that God will cause or allow the destruction of fetuses as a punishment for Sin.
Adapted from a deleted article at RationalWiki