But conditions have deteriorated sharply since the storm, which completely destroyed the only hospital in the municipality. The workload is just as heavy in Jérémie, capital of Grand'Anse.
MSF is working to improve the availability of services in this field and raise community awareness, emphasising in particular the need for victims to seek medical care within 72 hours of being attacked.
There is a shortage of nursing staff and resources in public facilities, and private clinics remain unaffordable for the majority.
Haiti’s health system has been further weakened after the damage caused by Hurricane Matthew at the end of 2016.
Just under half of all child victims of sexual assault who came to the clinic were referred by the police, a sign authorities are playing an important role in helping girls and women get emergency care, MSF said.
"Their collaboration has been instrumental for ensuring timely medical and psychological care for young survivors," the MSF report said.
Last updated 23 January 2017 MSF currently operates six hospitals in the metropolitan area of Port-au-Prince: the Drouillard hospital burn unit, the Martissant 25 emergency centre, the Nap Kenbe emergency surgical hospital, the CRUO referral centre for obstetrical emergencies, the Pran Men'm clinic for survivors of sexual and gender-based violence, as well as the emergency and cholera response unit, which can be operational within hours.