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Figure 1: Reasons for wanting to know the fetal sex. The reasons that scored the highest percentage for being (very) important were curiosity (77.8%), “just want to know” (68.0%), and “because it is possible” (66.8%). Most (very) unimportant factors for wanting to know the fetal sex were the aspect of sex preference (81.1%), for preparing older siblings (73.5%) and for emotional attachment to the child (72.2%).