Hi.. Primolut N has not shown any serious ill effects on the fetus in humans.. It is to avoided for the possible sideeffects that has occurred during animal studies.. Hence if you are happy in continuing the pregnancy, then I it would be better to get a examination done and the anamoly scan during the first trimesten and then think of abortion.. Two pills accidentally taken should not be the only reason for you aborting, that is what i would say... You may take an opinion from a gynaecologist if you are interested..