The Nigerian schoolgirls who remain captives of Boko Haram militants "definitely" face the danger of being raped, a senior United Nations official has said.
"My worry is those girls don't come back half of them pregnant," the world body's special representative on sexual violence in conflict, Zainab Hawa Bangura told a luncheon at the British Residence in New York.
She was meeting with editors and the British ambassador to the US in preparation for an unprecedented global summit next week in London on sexual violence in conflict. Hollywood star Angelina Jolie and Foreign Secretary William Hague will co-chair the event.
The abduction of more than 300 schoolgirls by Boko Haram militants in April shocked the world and caused outrage among Nigerians. More than 200 girls remain captive.
Ms Bangura said the international community needed to prepare the girls' families for their return and put psychological and other support in place.
She told her audience that more than 2,000 girls in Nigeria had already been abducted before this case brought the situation to the world's attention.
The fate of the schoolgirls is expected to be an intense discussion at next week's summit. Some aid and advocacy groups wonder how any pregnancies from rape in such a high-profile case will affect the wider debate over access to abortion services.
US foreign aid is prohibited by Congress from subsidising abortions as a method of family planning, but advocacy groups have lobbied the Obama administration to issue an executive order saying aid could be used to provide abortions for women raped in conflict.
"It is imperative that during next week's summit, (US secretary of state John) Kerry and others address post-rape care as part of the larger conversation around sexual violence in conflict," Serra Sippel, president of the Washington-based Centre for Health and Gender Equity, said.
Ms Bangura, the daughter of a Muslim cleric, was almost married off at the age of 12 in Sierra Leone, but became a forceful advocate for women during the deadly conflict there. She said more than 60,000 women and girls were raped during the violence and the youngest victim for whom she advocated was three.
At the luncheon, Ms Bangura wove stories of her own background with startling details about her work persuading leaders, often men, to see sexual violence as a serious issue.
She said she won Congo president Joseph Kabila's attention to the issue of sexual violence by members of his military by asking him how he would feel if his twin sister were raped.
But she said that in Somalia, a leading judge there scoffed: "In Somalia, we don't have rape."
A report released this year by her office said there was unprecedented political momentum globally to end conflict-related sexual violence, but more effort was needed at the national level.
Ms Bangura said her office was now looking at 12 priority countries, including Syria, Colombia, Bosnia and Congo, where s he says perpetrators almost never face justice.
The issue of sexual violence goes beyond women, she added.
"Today, almost 10 countries we're looking at have evidence of sexual violence against boys," she said. "In Syria, it's terrible."
Ms Bangura also spoke of the need to fight the stigma of rape, especially in cultures where women might be blamed. In some cases, she said, women give up children born of rape because of the discrimination that follows.
She urged a higher status for women overall.
"If you don't respect your women in times of peace, you can't protect them in times of war," she said.