[Aspects to birth control (author's transl)].

From 1964, the year with the highest new born rate since 1945, until 1972, the number of births in the BRD was reduced for 34%. Simultaneously, the birth rate of women between 20 and 30 years was decreased for a third. Presently, the average age of half of the women who deliver their first or second child is over 30 years. While on the one hand there are investigations on the practical experiences which are hidden behind the obvious "one child effect", it would be, on the other hand, dangerous, to lay out a demographic "production policy" which shows no interest in economy. In birth-control, biotic-private individual foundations are variable elements; social values, however, are non individual objectives [corrected] with temporal relatively great constancy. The splitting of these elements is, in the 20th century, tracing back with violent actuality to the original big line of Malthus and Darwin, which is to maintain sufficient scope for nourishment and reproduction to the human world with its vegetable and animal life. This concerns industrial and development countries as well. The challenge is to line out acceptable ideas for the solution of the Circulus vitiosus, based on statistical data, on socio-philosophic understandings which have to be worked out yet and on common sense.