Twenty-five state lawmakers are upset by a wording change on Pennsylvania birth certificates that swapped out references to "mother" and "father" and changed it to parent.

They are blaming Democratic Gov. Tom Wolf for pushing his social agenda.

Turns out, it was one of their fellow Republicans who is initially responsible this birth certificate evolution.

The first change, approved in January 2015 during former Gov. Tom Corbett's administration, altered the form from identifying the mother as the mother/parent and the father as father/parent, according to health department spokeswoman April Hutcheson. Those words began appearing on birth certificates in June of that year.

The Wolf Administration authorized-change stripped out the words "mother" and "father" completely and made the parent reference gender neutral, similar to a change that the U.S. Department of State made to passports in 2011. The reference to "parent" only began appearing on birth certificates last August.

An attempt to reach Michael Wolf, who was the state health secretary at the time the Corbett Administration made the change, was unsuccessful.

But to Wolf spokesman J.J. Abbott, he said it proves this controversy that the House Republicans are stirring up "is a non-issue."

Rep. Daryl Metcalfe, R-Butler County, along with two dozen of his House Republican colleagues, sent Wolf a letter demanding he change the birth certificate form back to include a "mother" and "father" reference instead of parent.

Metcalfe told PennLive the law calls for "mother and father to be on the birth certificate, not parent and parent," Metcalfe said. "They are doing nobody any good by pushing their social agenda through changing birth certificates for all the many babies born since August. Every baby has a mother and a father. They don't have two parents that are not of the opposite sex."

But the Wolf Administration is showing no signs of yielding to the GOP lawmakers' request. Abbott said the change was made "to include all families and reflect the fact that same-sex marriage is the law of the land in Pennsylvania."