It was a year that saw gender politics catapulted to the fore and many women across the world speaking out. In the two-part series, Trailblazers, the BBC 100 Women season spotlights the trailblazing women who have turned their feelings of anger and indignation into a moment of action. In this second episode the programme interviews Vicky Phelan, an Irish mother who exposed a cervical cancer scandal, and Park Soo-yeon who took on South Korea's spy cams. Plus in Peru, BBC 100 Women speaks to Cindy Arlette Contreras Bautista, who became the face of a campaign against domestic violence when a video of her being attacked by her boyfriend went viral.

This is the surrogate mothers' club: women that volunteer to give birth to a stranger's child and receive only expenses in exchange. 100 Women speaks to the founder of Canadian Fertility Consulting and follows three altruistic surrogate mothers in Canada, as they navigate the emotional challenges of giving life to a baby that they will say goodbye to after birth. In a forward-thinking country that's seen a dramatic increase in surrogacy of an estimated 400% over the last decade, the programme meets the women behind the statistics to find out why they do it.

One woman in El Salvador is trying to say enough is enough when it comes to femicides, as the country has the worst rate in the world. Graciela Sagastume Lopez is the newly appointed special prosecutor against femicides and BBC 100 Women follows her in action trying to put a halt to the wave of murders that has made the country infamous. The film also hears from families of victims, international lawyers fighting for justice and reformed men trying to address male issues of identity and machismo - exploring why El Salvador consistently ranks number one in the world for women murdered by their intimate partner and what is being done about it.

Following a year that saw gender politics catapulted to the fore and many women across the world speaking out, the BBC 100 Women season spotlights the trailblazing women who have turned their feelings of anger and indignation into a moment of action. In the two-part series, Trailblazers, 100 Women hears from women as they reflect on the moment they decided to stand up - and the change they inspired. In this first episode 100 Women speaks to Shaparak Shajarizadeh, a woman from Iran who protested against compulsory hijabs, and Russian model Svetlana Alekseeva, who was severely scarred as a child and is now baring the marks on her skin to inspire body positivity.

Isabel Allende is one of the most acclaimed writers in the world. Her novels, which draw on her own eventful life in her fiction, telling stories of love, exile and loss, have sold more than 70 million copies and have been translated from Spanish into 42 languages. In this 100 Women interview the Chilean author talks to Kirsty Wark about the power of storytelling, her previous life as a refugee and her desire to live a passionate life.

In a special 100 Women interview, Samira Hussain talks to the president of the New York Stock Exchange. Stacey Cunningham is the first woman to occupy that post and is one of a few women in very senior positions in a very male-dominated industry. She talks about her rise from the trading floor to the top of the institution, society's expectations of women and if her industry is due its #MeToo moment.

Julia Gillard made history when she became Australia's first female prime minister in 2010. But her three years in office were overshadowed by misogynistic attacks from her opponents and dysfunction within her party. Since leaving politics, she has used her experience to help advance women and girls around the world through the promotion of education and leadership. In this special 100 Women interview, Yalda Hakim asks her to draw on her personal experiences and what advice would she give women who are struggling to break through their own glass ceilings.

In this 100 Women special interview Zeinab Badawi talks to deputy secretary general of the United Nations Amina Mohammed about what her gender, identity and past experiences bring to the job. A former politician with conservative roots in north east Nigeria, she is one of the most powerful women in global affairs. But she says she's an African first and will be heading back when her time at the United Nations is up.