Modern technology allows prospective parents to learn the sex of a fetus, and many of them use that knowledge to exercise a preference for sons. Absent such intervention, about 105 boys are born for every 100 girls. In 2011 it was reported that the number for boys per 100 girls has risen to 112 in India and 121 in China. Sex-selective abortion is hurting women in the West, too. The practice of eliminating people who are regarded as unacceptable because of their sex or significant defects, writes Steve Chapman, is an inevitable result of the proliferation of abortion.