We had intercose before 15 days and my girl missed her periods and even she checked twice positive, what can we do to abort this?

"this" is a baby: The medicine is by prescription, so a woman goes to her Ob-Gyn doctor (or a women's clinic) to be evaluated for it. Whether or not medicine can be used also depends on the age of the baby fetus (the number of weeks pregnant). The doctor will talk with the patient to be sure that the patient is making a good permanent decision, because abortion is a hard decision for any parents to make.