(USA Today) Another reason to forget middle children: Americans have stopped having them.

Ahead of National Middle Child Day (it’s Aug. 12, if you forgot), women’s lifestyle magazine The Cut points out that middle children could go extinct.

The Sue Hecks and Jan Bradys of the world are becoming a rarity, as family planning trends from the 1970s have essentially reversed.

In 1971, three children was ideal, Pew Research Center notes, citing Gallup data. In the late ’70s, more than 35 percent of moms between 40 and 44 had four or more children and just 22 percent had two children.

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