The absence of a heartbeat in more than nine weeks of pregnancy may be caused by irregular menstruation, delayed ovulation or embryonic arrest. The absence of a heartbeat in a fetus more than nine weeks pregnant may be due to irregular menstruation or delayed ovulation, according to menstruation is projected to be nine weeks, but in fact the gestation time is shorter, the fetus has not yet developed resulting in a review in a week or two, to observe whether there is a fetal heart. There is also the possibility of embryonic sterilizations, at which time the pregnancy needs to be terminated in time to avoid the occurrence of infection or hemorrhage. During pregnancy, you should take appropriate nutritional supplements, vitamins as well as folic acid as prescribed by the doctor, to help the healthy development of the fetus, and if there is no fetal heartbeat, you should be examined in time, and the pregnancy should be terminated if necessary.