SAN ANTONIO — When Texas child welfare authorities released statistics showing nearly 60 percent of the teen girls taken from a polygamist sect's ranch were pregnant or had children, they seemed to prove what was alleged all along: The sect commonly pushed girls into marriage and sex.

But in the past week, the state has twice been forced to admit "girls" who gave birth while in state custody are actually adults. One was 22 and claims she showed state officials a Utah birth certificate shortly after she and more than 400 minors were seized from the west Texas ranch in an April raid.

The state has in custody 2 dozen other young mothers and others whose ages are in dispute. If most of them also turn out to be adults, it would be a severe blow to the state's claim of widespread sexual abuse.

If it turns out the other 24 disputed minors are adults, the number of actual 14- to 17-year-old girls with children could drop to as low as five or six. That would amount to about one-fifth of the girls that age found at the ranch — substantially higher than the average rate of teen pregnancies in Texas but a far cry from 60 percent.

"It's not widespread, and you've got to look at every family individually to determine whether there's a problem in a family," said Rod Parker, a spokesman for the Fundamentalist Church of Jesus Christ of Latter Day Saints, the renegade Mormon sect that runs the ranch.

"There's no reluctance on our part to go ahead and take appropriate action if and when we can determine these are adults," said Patrick Crimmins, a spokesman for Child Protective Services. "We are working as quickly as possible to sort this out and realize the urgency."

All 463 of the Fundamentalist Church of Jesus Christ of Latter Day children removed from the Yearning For Zion Ranch have been in state custody for six weeks and are scattered in foster care facilities around the state.

Crimmins said he's not sure how long it will take to resolve the disputed-minor cases. CPS has complained that sect members refused to cooperate with their investigation, constantly changing answers or refusing to answer questions about age and parentage.

Parker contends the state ignored evidence the young mothers presented, including birth certificates and Social Security cards. He said that with their long braided hair, makeup-free faces and pioneer dresses, the women look very young.

"They're deliberately ignoring official records that show these mothers are not minors," he said, citing the Utah birth certificate showing Louisa Bradshaw Jessop was born in 1986.

Patricia Matassarin, Jessop's attorney, questioned how a person proves her age if officials won't believe a birth certificate or driver's license, which Jessop also gave the state.