Final answer:
A Texas district court deemed the state's abortion ban illegal due to its infringement on the right to privacy, a principle that has been foundational in upholding women's reproductive rights.
Step-by-step explanation:
A Texas district court ruled the state's abortion ban illegal because it violated the right to privacy. This legal concept has played a significant role in previous Supreme Court decisions, such as Roe v. Wade, which established a woman's right to have an abortion under the right to privacy protected by the 14th Amendment. Furthermore, courts have struck down various laws, including those that impede on a woman's ability to make decisions regarding her body and reproductive health.