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 twin s: About 1 in 250

Odds of having conjoined twins : About 1 in 200,000

Odds of having natural triplets : About 1 in 8,100