It was organized by the Women's Strike, a group behind a string of mass nationwide protests since the Oct. 22 abortion ruling.

In Warsaw, protesters marched from the office of Ordo Iuris, a conservative group that has pushed for a full abortion ban, to the parliament building, which was surrounded by police officers in riot gear.

Law and Justice has governed Poland since 2015 and is popular for its social conservatism and generous social spending.