The purpose of this paper is to investigate the situation of maternal and child health for thirty years from 1952 to 1981.
I have reported the changes of natural features, communities, living conditions, labor technology, and structure of population in farming villages, and the twelve subjects such as 1) superstition, 2) artificial abortion, 3) birth control, 4) labor in menstrual period, 5) signs of physical fatigue of pregnant women, 6) birth and child nursing, 7) pesticide poisoning, 8) abortion due to use of small type cultivators, 9) unbalanced diets, 10) lumbosacral pain, 11) influence of rural environments and 12) decrease of farm population.
Mechanization in agriculture, urbanization of rural life, and stagflation have been proceeding, therefore farmers' wives have to work with might and main to earn agricultural and non-agricultural income.
By my opinion the socioeconomic policies are essential in the rural areas to ensure an early and strong recovery, to increase of farmhouseholds income, and to secure an ample national budget for the development of health services.

I. We made a factoranalytical research of these indicators by Thurstone's centroid method and extracted four common factors.
II. We calculated the Z-scores (I) of the above 19 variables which were closely related with four common factors and the Z-scores (II) of the another 5 variables by urban and rural which were live birth rate, premature infant birth rate, infant mortality rate, α-index and maternal death rate, and computed the cofficient of correlation between the Z-scores (I) and the Z-scores (II), and investigated the influence of environmental factors on maternal and child health.

I. We made a factoranalytical research of these indicators by Thurstone's centroid method and extracted five common factors.
II. We calculated the Z-scores (I) of the above 12 variables which were closely related with five common factors and the Z-scores (II) of the another 10 variables by prefectures which were live birth rate, premature infant birth rate, live birth rate by hospitalization, infant mortality rate, neo-natal mortality rate, α-index, artifical foetal death rate, etc., and computed the cofficient of correlation between the Z-scores (I) and the Z-scores (II), and investigated the influence of environmental factors on mate rnaland child health.