Whoa, this is quite dangerous and other measures should be taken immediately; if the child isn't aborted by now, high doses of any synthetic mineral or vitamin is dangerous while pregnant. The whole idea that taking high doses of vitamin C could end pregnancy came from a study conducted on rats - not humans. A study like that on humans would obviously be unethical. So, in the study conducted on rats, during the first month of pregnancy, it was found that high doses of vitamin C may suppress the production of
progesterone from the
corpus luteum. Progesterone, necessary for the maintenance of a pregnancy, is produced by the corpus luteum for the first few weeks, until the placenta is developed enough to produce its own source. By blocking this function of the corpus luteum, high doses of vitamin C (1000+ mg) are
theorized to induce an early miscarriage. Taking this idea to mind, it was found that in a group of spontaneously aborting women at the end of the first trimester, the mean values of vitamin C were significantly higher in the aborting group than in nonaborting women. However, this could not be interpreted as an evidence of causal association. But, in a previous study of 79 women with threatened, previous spontaneous, or habitual abortion, 91% success with 33 patients who received vitamin C together with bioflavonoids and vitamin K (only three abortions), whereas all of the 46 patients who did not receive the vitamins aborted.
That's the theory behind it, now my medical advice. Firstly, your friend is very uninformed and is using the internet not how it is supposed to be used. She should speak to a doctor in case she has caused damage to the fetus (to me, that should be a criminal offence) and she should be imprisoned. Nextly, luckily for her, vitamin C is water soluble so if she is fortunate, a lot of those vitamins she has been consuming were excreted out in her urine.
Good luck!