Abstract: Research on the human bi rth failing to report from Jan. 1, 1999 to June 30, 2000 in West Hunan was carried out with a method of sampling. The result showed that the rates of birth failing to report of the year 1999 and previous half of 2000 were 19.98% and 23.08% respectively. The main causes that resulting in the birth failing to report were neglect of statisticians, the birth failing to report in the cities and the nonnative birth failing to report. It is considered that the birth failing to report can result in the deviation of statistical results of the maternity and infant death rates of the Autonomous Prefecture of Western Hunan. So the results of research on the birth failing to report can be used to calibrate the values of maternity and infant dead rates, which are useful for health service to make a scienti ficdeterminat ion.

Key words: investigation of human birth, human birth failing to report, maternity death rate, infant death rate