Hello Thanks for your query. Firstly, if your pregnancy test was positive, taking Registrone is a contraindication. i wonder if it was a gynecologist who prescribed it ! For a positive pregnancy test, if you wanted an abortion, you would have been, and should have been, directed for a medical abortion with tablets or a surgical abortion. Registrone contains norethisterone which is harmful to the developing fetus. There are possibilities of virilization of a female fetus, as well as various other abnormalities in the developing fetus. However you have taken the tablets only for 3 days, and you have not provided the details of the weeks of gestation so far. Please consult a Genetic Counsellor for further evaluation. take care.