Unborn heartbeats pulsed through the streets of Chile recently as a group of pro-life feminists marched to protest abortion. The movement was part of a project called La Voz del Corazon, or the “Voice of the Heart,” organized by pro-life feminist movement Reivindica. While marching to government buildings in Santiago, pregnant mothers amplified the sound of their unborn babies’ heartbeats with megaphones, C-Fam reported.

Chilean President Michelle Bachelet has been pushing to ease the country’s total abortion ban since before she was elected in 2014. The ban is one of the strictest in the world, with women who have abortions and doctors who perform them eligible for jail time.*

The group shared the story of their protest in a moving video. “For the first time ever in the Chilean public debate the matter of those who have no say is going to be challenged … those who cannot express themselves, who cannot allege anything, who cannot lobby parliament,” mother of three Macarena Matas said in the video. “And being able to be the voice of those who at present have no say in the matter, is overwhelming.”

Many are pushing back in support of the nation’s pro-life stance, including Reivindica. “It seemed obvious to us, that we were lacking a female representation to introduce maternity into the public debate,” said Reivindica president Rosario Vidal. “This is all about giving them a voice.”

A study funded by the British Heart Foundation at the University of Oxford found last month that a baby’s first heartbeat can occur as early as 16 days after conception.

“This is all about giving them a voice,” Nevenka Astudillo, a teacher featured in the video said, “this is giving them the voices from the heart, the voices coming from inside the womb crying out, ‘I’m here, I’m here mommy, don’t forget, I’m still here.”

* The Stream previously reported incorrectly that abortion was punishable in Chile by up to 15 years in prison.