Most parents say they would be totally happy with a healthy, bouncing baby—girl or boy. But deep-down, many can’t shake their secret hopes for one sex or the other. In fact, according to The Courier Mail, one Australian couple is being denied the right to have another baby through IVF after they terminated twin boys because they wanted a girl. This gender selection craze isn’t a new-age thought for modern couples, though. We take a look back nearly 4,000 years at the most popular gender selection methods throughout history.