Texas officials have blocked hundreds of immigrant parents from obtaining birth certificates for their children.

Undocumented workers in the Lone Star state have reportedly been denied birth certificates for their children for the last two years. As a result, despite the fact that these children were born in the U.S., it is difficult for parents to enroll them in Medicaid or day care, or even get them baptized.

Prior to the Texas crackdown on birth certificates, immigrants who lacked legal identification documents, like a driver's licenses or a green cards, were allowed to use secondary forms of identification to obtain their children's birth certificates from the Department of State Health Services. One previously accepted form of ID was a Mexican matrícula consular identification card. However, many Texas county registers are starting to change their policies, Think Progress reports.

For instance, the Dallas County clerk's office announced on its website that, starting on June 1, its county registrars will "no longer accept the Mexican Matrícula Consular Card as verification of identity for purchase of birth certificates or for obtaining confidential records."

Immigrant rights advocates say that some officials are implementing the new rule in order to make it harder for undocumented residents to live and raise families in Texas.

"It's not right," said a 34-year-old woman who was denied birth certificates for two of her children, according to the New York Times. "Yes, I'm here illegally. But I'm the one who committed the crime, not them."

"People in Austin started tightening the screws," added Efrén C. Olivares, a lawyer with the South Texas Civil Rights Project, who represents the parents in a lawsuit to get the immigrants access to their child's birth certificate.