Surprising research … The number of sperm is decreasing. Investigators who studied 185 studies in North America, Europe, Australia and New Zealand found that between 1973 and 2011, the number of sperm was reduced by more than 50 percent. According to Dr. Hagai Levine, head of the research team, he said that the result they received was extremely worrying. Epidemiologist Dr. Hebrew University in Jerusalem Levine found that the reduction of the number of spermatozoa in the present circumstance could lead to ‘the end of mankind’. The results of the research published in the magazine “Human Reproduction Update” are considered to be one of the most comprehensive of what has been done to date. According to the survey, sperm density in the four regions decreased by 52.4 percent. The decrease in the total number of sperm was 59.3 percent. ‘No decrease in South America, Asia and Africa’ In South America, Asia and Africa, the number of sperm was not significantly reduced in the study. However, researchers note that very little work is done on sperm in these regions. Some scientists say that, despite the recent research, there is still much work to be done on this topic. Professor Allan Pacey of the University of Sheffield in England said that Dr Levine and her colleagues have corrected many of the previous investigations, but they must still be cautious about their findings. There is no clear evidence for the reasons for the decrease in sperm count. According to Tina Kold Jensen, professor of Syddansk University in Denmark; People generally do not realize that the quality of their sperm is getting smaller. When a 21 year old young man is about to make a child from a woman close to his or her age, the child usually has a difficulty if he or she attempts to do it from a 35 year old woman. It is very important to have sperm control every year. However, some scientists rank chemical substances used in pesticides and nylon bags as possible causes of this, ranging from obesity, smoking, stress, some diet varieties and even watching too much television. Africa,   America,   Asia,   European,   Australia,   Child,   Denmark,   diet,   doctor,   South America,   Britain,   North America,   cigarette,   sperm,   New Zeland,