The medical term is "molar pregnancy". It's critical time to remove the cell asap. At the same time, support from family & friend is very important.
Your friend should have medical check up throughout the year in order to make sure no reoccurance of molar pregnancy. It is recommended to see doctors at public hospital as it is a rare case and private doctors may have less experience in dialgnosis. But don't worry, she can be pregnant and give normal and healthy baby again.