Perhaps you expect this to be a pro-life piece? Sorry, look elsewhere. WARNING: this article is likely to raise the blood pressure of anti-abortion folk.
The Guttmacher Institute has issued a report which states that increased contraceptive use worldwide has resulted in fewer abortions. The number of abortions worldwide fell from 45.5 million in 1995 to 41.6 million in 2003. It is likely that contraception will continue to rise, and abortions will continue to fall. The proportion of married women worldwide who use contraceptives rose from 54% in 1990 to 63% in 2003. Just guessing, if we could get to 100%, would that eliminate another 10 or 20 million abortions annually?
Sub-saharan Africa is an exception to the trend. 38,000 women died in unsafe abortions in 2003, nearly half the planetary total. Contraception there has lagged other regions, partly due to the active resistance of Catholic Churches there. The report estimated that almost half the 41 million abortions of 2003 were conducted in a way that endangered the life of the woman. Around 8 million of the women experienced complications.
The Guttmacher Institute, in the interest of honesty, does favor access to contraception and to abortion. But I think that the data they compiled does point to contraception as the only realistic alternative to abortion, long term. Telling women they can't have abortions tends to drive them underground to unsafe abortions. Pushing contraception, and making it inexpensive, actively tends to create conditions in which fewer unwanted fetuses come into existence, resulting in a lack of interest in abortion.
Okay, I have said my piece. Rant if you wish.