A western Michigan couple with 12 sons already have kept the all-male streak alive with the birth of boy No. 13.

Jay Schwandt tells The Associated Press that his wife Kateri gave birth to the boy Wednesday.

The couple had said they were sticking to the tradition of not knowing the sex of the baby ahead of time.

The 40-year-old father confirmed the birth in a text message to The Associated Press, saying the family will release details Thursday morning on ABC-TV's "Good Morning America."

The Schwandts live Rockford, north of Grand Rapids.

Forty-year-old Kateri Schwandt says she has a lot of experience with large families, growing up as one of 14 children.

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Information from: The Grand Rapids Press, http://www.mlive.com/grand-rapids