Prolactin (µg/L)
   Male: 4.1 – 21.4
   Female: 3.4 – 29.9
       Unknown menstruation cycle status  3.4 – 29.9
       postmenopausal 3.4 – 24.5
   Boys:
       < 1 months < 81
       1–12 months < 29
       1–3 years < 13
       4–6 years < 17
       7–9 years < 12
      10–12 years < 13
      13–15 years < 17
      16–18 years < 17
   Girls:
       < 1 months < 95
       1–12. months < 30
       1–3 years < 17
       4–6 years < 13
       7–9 years < 13
      10–12 years < 10
      13–15 years < 14
      16–18 years < 18