The Netherlands Interuniversity Demographic Institute (N.I.D.I.- established in 1970 - is mainly concerned with research into the factors which, either directly or indirectly, influence demographic development in the Netherlands. The institute also tries to stimulate and co-ordinate such research and maintains a close working relation­ ship with the Central Bureau of Statistics and other data collecting and planning agencies. Other important aims of the N.I.D.I. are to further the training of demographic experts anr to publish and disseminate the results of demographic research. For this purpose an information bulletin is issued at regular intervals, while several other forms of publication - periodical, working papers, etc. - are also being used. This book is the second monograph in the series 'Publications of the Netherlands Interuniversity Demographic Institute', and presents the maior findings of the Netherlands National Fertility Survey 1969, a survey made possible by grants of the Netherlands Organization for the Advancement of Pure Research (Z. \';.O.).