 ቢሆንም ግን በእርግዝና ላይ ሁነው ክትባቱን የወሰዱ ሴቶችን ሁኔታ ከየሆስፒታሉ መረጃ በመሰብሰብ ጥናቶቹ በመሰራት ላይ ናቸው።
Later, however, when doctors reported miscarriages among pregnant women who had been vaccinated, these authorities decided to start a research project.