If a patient had a vasectomy, how could the forensic scientists analyze his semen? That spermless semen, which may also be referred to as seminal fluid, is still of interest to forensic scientists. But several experts in bone marrow transplants said that the forensic scientists’ findings made sense from a medical standpoint and that the answer involved white blood cells. Semen contains a number of different types of white blood cells, including macrophages, neutrophils and lymphocytes — all of which support the immune system. “Since all white blood cells come from the bone marrow donor after a bone marrow transplant, it will not be a surprise that ejaculate containing white blood cells will also be of the donor.”

Source: International New York Times December 12, 2019 15:00 UTC