Calculating the odds: 12 sons in a row

Family has 12 sons, expecting 13th child
Family has 12 sons, expecting 13th child


    Family has 12 sons, expecting 13th child


Family has 12 sons, expecting 13th child 01:56

Story highlights

  • A couple in Michigan has 12 sons and no daughters
  • Baby number 13 is on the way; they don't know its sex
  • Odds that anyone could have 13 boys in a row: about 1 in 8,000
They may not beat the Duggars for sheer number of children, but this couple in Michigan has their own kind of reality-TV-worthy reproduction streak going on.
Kateri and Jay Schwandt of Rockford have 12 sons and no daughters, all conceived naturally, according to the Detroit Free Press. The odds of that happening are approximately 1 in 4,000. "Star Wars' " C-3PO says you have a better chance of navigating an asteroid field successfully than of duplicating their streak.
Better yet? Baby No. 13 is due in May, and Kateri, at least, is hoping for another boy.
The odds of the couple having 13 sons in a row is about 1 in 8,000.
circa 1955: A nurse lifting up a three month old baby boy at Mount Sinai Hospital in New York. (Photo by George Heyer/Three Lions/Getty Images)
Of course, that's not as unlikely as say, winning the Mega Millions jackpot (odds: 1 in 175,711,536). But it's awfully close to your risk of being struck by lightning.
Here are some other birth odds:
Odds of having a boy: 1 in 2
Odds of having a girl: 1 in 2
Odds of having natural identical twins: About 1 in 250
Odds of having conjoined twins: About 1 in 200,000
Odds of twins giving birth on the same day: 1 in 400,000
Odds of having natural triplets: About 1 in 8,100
Odds of having natural quadruplets: About 1 in 700,000