Abortions are often used as convenient "whoops" last resort birth control without a trivial thought--at least that was the case with the females in my town.

Cannot fathom why some people find safe sex so difficult to practice.

However, one of my best friends was on the pill and became pregnant anyway--the obgyn said her boyfriend had extremely potent sperm. 

-teehee-

and also that she still should have used a condom. 

She kept the baby though and loves him to pieces, doesn't regret a thing. 

Then there are cases like this girl I went to high school with. She had so many abortions by freshman year the doctor stated it would be a miracle if she could ever become pregnant again...

-shrugs-