<Li> Development of circulatory system <Ul> <Li> Heart development </Li> </Ul> </Li> <Ul> <Li> Heart development </Li> </Ul> <Li> Development of digestive system <Ul> <Li> Tooth development </Li> </Ul> </Li> <Ul> <Li> Tooth development </Li> </Ul>

Which of the following is not a general risk factor for prenatal development