"The figure of 55 million persons aborted, typically reported by pro-life groups, is a significant undercount," says Olson, a pro-life political consultant. "Abortions did not magically begin occurring in 1973 [when the Supreme Court allowed them], yet that is when everyone starts counting."

Using widely accepted pre-Roe v. Wade estimates, Olson's research additionally accounts for the compounding nature of population by including the generations of offspring that would have been born to those persons otherwise aborted. The result: The United States has suffered a population loss of over 125 million ...