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Immaturity (less than 37 completed weeks) --see also Preterm, newborn
    extreme of newborn (less than 28 completed weeks of gestation) (less than 196 completed days of gestation) (unspecified weeks of gestation) P07.20
        gestational age
            23 completed weeks (23 weeks, 0 days through 23 weeks, 6 days) P07.22
            24 completed weeks (24 weeks, 0 days through 24 weeks, 6 days) P07.23
            25 completed weeks (25 weeks, 0 days through 25 weeks, 6 days) P07.24
            26 completed weeks (26 weeks, 0 days through 26 weeks, 6 days) P07.25
            27 completed weeks (27 weeks, 0 days through 27 weeks, 6 days) P07.26
            less than 23 completed weeks P07.21
    fetus or infant light-for-dates --see Light-for-dates
    lung, newborn P28.0
    organ or site NEC --see Hypoplasia
    pulmonary, newborn P28.0
    reaction F60.89
    sexual, after puberty (female) (male) E30.0