In a general way, the main goal of the FFS 1997 was to understand the new patterns of fertility and family formation in Portugal, enabling, among other things, the characterisation of the current fertility pattern of the Portuguese woman and get a picture of family situation in Portugal. The survey was carried out on a sample of men and women living in dwelling units. The women were aged between 15 and 49 and the men were aged between 15 and 54. This study yielded a sample that included 6260 women and 3130 men.
Instituto Nacional de Estatística - Inquérito à Fecundidade e Família : 1997. Lisboa : INE, 2001. Available at www: <url:https://www.ine.pt/xurl/pub/133771>. ISBN 972-673-470-3