 [ Symptoms ] how do doctors determine where a pulmonary embolism came from  my sister died during a pregnancy from a pulmonary embolism the autopsy determined the clot came from the femoral vein  i am in human body and disease class and the topic that i picked from the hat was pulmonary embolism i am going to use part of my sister is autopsy in my research paper that is why i need to know how the medical examiner was able to make the determination of where the embolism came from  thank you for your help  radar [ Disease ] hi have you thought its hay fever and tried any meds for that good luck ps hay fever can start at anytime of life