Reported problems in the first year of life by participants with 3q29dup and controls. Rate of problems in the first year of life reported by participants with 3q29dup (n = 31) and typically developing controls (n = 64), showing that participants with 3q29dup report substantially more problems in the postnatal period. ***, p < .001; **, p < .01; *, p < .05; n.s., not significant