Republican lawmakers introduced legislation Thursday to protect biological sex as a distinct legal category.

The legislation defines sex as "a person's biological sex [either male or female] at birth and adopts the common public understanding of the words 'woman,' 'girl,' and 'mother," according to a press release shared with the Washington Examiner.

House GOP members introduced the legislation outside the Capitol Thursday.

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If adopted, it will "codify the Supreme Court’s intermediate scrutiny standard, which forbids unfair sex discrimination but allows government to recognize sex differences when substantially related to an important government interest," the release read.

"Our colleagues on the Left are trying to erase women," Rep. Debbie Lesko (R-AZ) said. "Whether it's taking the word mother out of written law or allowing biological men in women's domestic violence shelters, Democrats are erasing women and the spaces that are uniquely ours."

"This bill, The Women's Bill of Rights, is pretty simple. It acknowledges the biological differences in men and women, highlights the importance of differentiating between men and women in law for the purposes of protecting sex-segregated activities and organizations, and affirms the importance of using 'mother' and 'father' in written law to protect families."

There is a definition for what a woman is, according to Rep. Diana Harshbarger (R-TN).

"As a pharmacist, allow me to define a woman for you," Harshbarger said. "Females are the sex that have the capacity to bear children or produce eggs. In simple terms, that means a human capable of giving birth to another human."

"If you're still confused, follow the science," she added. "Women have two X chromosomes, are born with a uterus and ovaries, and they have a menstrual or ovarian cycle, which means they can give birth."

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Defining what a woman is "not that hard," said Harshbarger.