People nowadays raise many objections to adding kids to their family, even if they desire more.

While five-kid families are rare today, between five and six kids was the standard for Americans back when we and the world were a lot poorer. Even up until the 1950s, the average U.S. family size was between three and four kids. Today, most people would like to have at least three kids. Nonetheless, U.S. fertility rate keep dropping to record lows. Most recently, it’s at 1.8 kids per woman.