Clustering of characteristics associated with unplanned pregnancies: The generation R study

Unplanned or unintended pregnancies form a major public health concern because they are associated with unfavorable birth outcomes as well as social adversity, stress and depression among parents-to-be. Several risk factors for unplanned pregnancies in women have previously been identified, but studies usually take a unidi‑ mensional approach by focusing on only one or few factors, disregarding the possibility that predictors might cluster