(CNN)Marta Gorczynska got in her car and started driving.
She didn't have a destination as she passed through Warsaw's mostly deserted streets, but, just before noon last Tuesday, she got a text with directions: go to Rondo Dmowskiego.
Gorczynska, a human rights lawyer, was among a throng of protesters that used their vehicles to defy Poland's lockdown and block the main roundabout in the capital, honking their horns and shouting slogans against a citizen's bill to tighten what are already some of the most restrictive abortion laws anywhere in Europe.
Some were holding black umbrellas -- a symbol of Poland's abortion rights movement -- while others had "Women's Strike" posters taped to their windows. Demonstrators dressed head-to-toe in black, and wearing face masks, circled on bicycles. Police shouted over megaphones, warning that assemblies were illegal during the pandemic and urging the women to go home.
As governments across Europe continued to grapple with the worst health care crisis of the modern era, Polish lawmakers debated draft legislation last week that would ban abortion in the case of fetal abnormalities -- one of the few remaining circumstances in which the procedure is still allowed in the majority Catholic country.
Ultimately, Poland's lower house voted to send the bill to a parliamentary commission for more work. But the timing, which was slammed by human rights campaigners, presented a fresh challenge for women's rights activists who have been fending off an abortion ban for years: how to protest in the time of coronavirus.
"We saw this as an attempt by the government to use the lockdown to push for this controversial law, because, as history shows, all these attempts of the government to amend the abortion law have always triggered a lot of demonstrations," Gorczynska said, referring to a nationwide "Black Monday" strike in 2016 that drew millions.
"If there was no lockdown, thousands of women would have been on the streets. So we were using other tools, especially online ones."
Those who couldn't come out found other ways of demonstrating. Protesters rallied around hashtags like "black protests" and "women's hell" on social media, sharing photos of themselves in black and white or holding abortion pills in their palms. Others hung posters from their balconies or went out for their daily exercise with messages of resistance taped to their backs.