Exclusion criteria: «Dyads were excluded for atypical stays characterized by (1) a 2 -
night or longer stay
after a
vaginal delivery; (2) a 4 -
night stay or longer
after a cesarean section; (3) a hospital course with atypical complications (e.g., ambiguous genitalia, endometritis); or (4) newborn hyperbilirubinaemia requiring phototherapy during the nursery stay.