CEDAR SPRINGS, Mich. (WOOD) — The odds of a vasectomy failing are one or two in 1,000 and it’s about the same for a tubal ligation, according to the comprehensive U.S. Collaborative Review of Sterilization study. So it’s safe to say that a Cedar Springs couple that added children after those procedures failed three times have more than beaten the odds.

Surprised but coping parents Dara and Christopher Sundberg have five sons ranging in age from 1 to 7 years old. Eric, 2, and 1-year-old Adam are the products of their father’s vasectomy failing twice.

“We were thinking two, maybe three. Yeah, two maybe three, but then once three happened, We’re like, ‘yeah, let’s do that fourth one. Four sounds good. We can do four.’ And decided to stop,” Dara Sundberg said.

That didn’t happen.

After his vasectomy failed, Chris Sundberg was told it was a fluke and it was working the ways it was supposed to. But his wife decided she was not going to take any chances, so when Adam was born, she decided to have her ‘tubes tied.’

“‘Oh my Gosh, this is the time of year that I would get pregnant if I weren’t ‘fixed,'” she remembers thinking. “I thought my anxiety was misplaced, but it was not.”

The tubal ligation failed. The sixth Sundberg baby is scheduled to arrive on Dec. 7, when it will be seen if the family can test the odds further by having a sixth son.

“I’d be lying, of course, if I said I wasn’t upset. But it’ll be very welcome and very loved,” Dara Sundberg said. “And if it is a girl, she will never date.”

The Sundbergs have come to accept the unexpected, even though it may mean expanding the house and buying a larger car.

“But yeah, we definitely have a house full of love, that’s for sure,” Chris Sundberg said.

Their oldest son, 7-year-old Doug, is OK with the surprise:

“I don’t think we have enough babies,” he said. “I think one more would be pretty good.”

Dara Sundberg has been a diabetic throughout all her pregnancies, but all the children have been healthy.

Nevertheless, they plan to make sure the baby is the last one. Dara Sundberg plans to undergo a more extensive tubal ligation. But this is a couple that knows there’s no such thing as a sure thing.

“I’m looking at almost a decade of being either pregnant or breastfeeding,” Dara Sundberg said.

The Sundbergs said they would advise people who want to avoid their situation to have their procedures not only double- but also triple-checked.

They say they now know it’s true that life is what happens when you’re making other plans and despite the surprises, they would not change a thing.

The Sundbergs have a GoFundMe page for people to contribute to building the addition to their home or to buying the much larger vehicle they will need.