That paper presents a step of a research oriented by two aims. One is "substantial", and can be summarized as an attempt to show content particularity of special relations which can be said created by and linked to life cycle events. Here, I wouldn't precise that aim. The second one is of more general concern: it deals with methodological and theoretical assumptions in personal network analysis, mainly with a way to take into account each "relation" not as a set of independent interactions or social exchanges but as a system in which partial contents are linked together. Data should be used to illustrate the discussion which stand at the "zero level" of personal network analysis in so far as only relations between ego and alters are examined, without information and comments on alters-alters relations.