Fox News faced a fresh legal challenge on Monday after Diana Falzone, a reporter at the network, accused it of discriminating against her on the basis of her gender and her fight against a chronic disease.

Ms. Falzone, who appeared regularly on Fox News and helped host several shows on the network‘s website, claimed in a suit filed Monday in the New York State Supreme Court in Manhattan that she had been barred from further appearances after writing an op-ed column for Fox News disclosing that she had endometriosis and was likely to be infertile.

The suit claims that Ms. Falzone had approval from her supervisors to write the column, which ran with the headline “Women Should Never Suffer in Silence.”

According to the lawsuit, her supervisor, Refet Kaplan, told her shortly after the piece ran that executives at the network had barred her from appearing on the air on Fox News or its website, the suit says, adding that Ms. Falzone was not given a reason for the decision. The filing did not elaborate on why she believed the column led to her being barred other than noting that it happened three days after the article was published and that she previously had received positive performance evaluations.