Updated at 7:05 p.m.: Revised to include comments from Fort Worth Rep. Charlie Geren.

AUSTIN — The Texas Catholic Conference of Bishops issued an advisory Thursday asking parishes not to participate in volunteer efforts with anti-abortion group Texas Right to Life.

"We write to inform you of our concerns with Texas Right to Life and we urge parishes not to participate in their activities or allow the organization to use parish sites," the bishops said in their advisory.

Part of the bishops' main problem with Texas Right to Life stems from the anti-abortion group's "rejection of incremental pro-life reforms." According to Pope John Paul II's Evangelium Vitae, a church document that talks about the sanctity of human life, incremental reforms are better than none.

"Texas Right to Life often opposes the Texas Catholic Conference of Bishops and has implied that the bishops do not faithfully represent Church teaching," the bishops wrote.

The bishops said they've had to correct the anti-abortion group on the church's stance regarding end-of-life care. They also said they don't trust Texas Right to Life's legislative scorecard, which grades lawmakers using their votes on abortion-related bills.

"We believe this publication is not based on a fair analysis of a legislator's work, but rather upon whether the legislator has followed voting recommendations of Texas Right to Life," the bishops wrote. "Unfortunately, a number of legislators who have consistently voted for pro-life and end of life legislation have been opposed by Texas Right to Life."

Some of those legislators include Republican Reps. Charlie Geren of Fort Worth and Cindy Burkett of Sunnyvale, who have a record of voting to restrict abortion but received grades of 89 percent and 73 percent, respectively. Burkett is running for the Senate seat held by Republican Bob Hall of Edgewood, who received a score of 100 percent.

Geren said that Texas Right to Life clashes with the Catholic Church on the group's goal of eliminating abortions entirely, rather than accepting less-sweeping anti-abortion legislation.

"We've been able to pass legislation that makes getting an abortion much more difficult in Texas, without passing something that will end up in court," Geren said. "The pro-life goal is to pass something that isn't going to get thrown out. That's not Texas Right to Life. They want it all, and they want it all now. I don't disagree with where they're trying to go, I just disagree with how they are trying to get there."

Bishop Michael Olson of Fort Worth tweeted about the advisory and said his announcement would be read at all Masses in his diocese. The advisory will also be posted on each parish's website and put in parishioners' bulletins, he wrote on the diocese's website.

Please read my announcement to be read at all Masses this weekend w/bulletin insert about human life: https://t.co/h8g45P3Lms @TXCatholic — Bishop Michael Olson (@BpOlsonFW) February 22, 2018

The bishops clarified that the Texas Alliance for Life and the Texans for Life Coalition maintain positions consistent with their own.

Texas Right to Life spokeswoman Melissa Conway did not respond to a request for comment at the time of publication.