The protests against Poland's proposal for stricter abortion laws have been going on for over a week.
The triggering factor was last Thursday's decision in the Polish Administrative Court, which ruled that abortion is contrary to the Polish constitution.
Record-breaking demonstrations
The decision means that Poland now has an opportunity to introduce a new law that prohibits abortion except in the case of rape or when the mother risks dying.
On Friday, the streets of Warsaw were refilled in what is described as the largest demonstration to date.
Protesters have also gathered outside the House of Justice and Justice Party leader Jarowslaw Kaczynski's house.
"This is about the freedom and dignity of the people," Klementyna Suchanow, a spokeswoman for the protest movement, told the Associated Press on Friday.
The information on how many people participate in the protests varies, but according to information from local authorities, it is tens of thousands of people.
At the same time, there are reports of counter-protesters throwing fireworks at the demonstration trains.
Wants to sentence protesters to prison
Polish Prime Minister Mateusz Morawiecki has previously likened the protests to "barbarism" and decided to deploy military police against protesters on Tuesday.
The protests have also been criticized for counteracting the country's work against coronary heart disease.
Poland has been hit extremely hard by the increased spread of covid-19, and for some time now there has been a ban on gathering in groups of more than five people.
The country's public prosecutor has previously warned of prison sentences of up to eight years for the Protestants, which he considers "constitutes an epidemiological threat".
Very strict legislation
Poland already has very strict abortion legislation and the court's decision means that almost all abortions that have been allowed can be stopped.
Last year, just over 1,000 abortions were performed in the country.
In 98 percent of the cases, it was injured fetuses, according to the BBC.