A study released Tuesday found that 53 allegations of workplace sexual harassment have been made against at least 30 House and Senate lawmakers over the past two decades, according to the nonpartisan National Women's Defense League.

The analysis comes amid what the organization described as a wave of ethics-related resignations in Congress. The lawmakers facing allegations represent 13 states and Guam, the advocacy group reported.

According to the study, most of the lawmakers who have faced harassment allegations have since left office. However, nine lawmakers who have been accused continue to hold seats in Congress.

The National Women's Defense League did not immediately release the names of the lawmakers or specific details about the nature of the allegations. The timing of the study's release coincides with ongoing scrutiny of congressional ethics and workplace conduct standards.

The findings highlight ongoing concerns about workplace harassment within Congress, where staff members and colleagues have raised questions about accountability mechanisms for elected officials facing such allegations.