Table 1.

Prolactin Serum Level (ng/mL) Baselines and Norms by Age and Sex

Reference	Age (yr)(m)	n	Sex	Mean PRL level	Mean±SD
Findling et al. 2011	6.9	96	65% male	5.7	5.7±3.7
Stigler et al. 2009	8.6	25	76% male	9.3	9.3±5.2
Aman et al. 2002	8.7	41	79% male	6.8	6.8±4.2
Marcus et al. 2011	9.5	199	87% male	7.4	7.4±4.8
Zhang 2009	9.7	244	89% male	6.8	—
Geller et al. 2012	10.1	216	50% male	7.2	7.2±4.7
Biederman et al. 2005	10.1	30	73% male	7.9	7.9±5.3
Sallee et al. 2003	10.9	24	79% male	7.2	7.2±2.0
Migliardi et al 2009	11.5	41	71% male	7.3	7.3±2.3
Staller 2006	12.3	18	56% male	6.4	6.4±1.5

Reference norms	Age range			Median	95% rangea
Siemens 2012	7–8	26	Male	6.7	2.5–25.8
Cook et al. 1992	7–9	203	54% male	—	1.1–12.4
Siemens 2012	7–8	24	Female	7.0	3.1–16.4
Siemens 2012	9–10	31	Male	6.7	4.2–13.4
Siemens 2012	9–10	24	Female	7.3	3.1–16.4
Cook et al. 1992	10–12	217	50% male	—	1.4–11.4

^a2.5 to 97.5 percentile (central) range.

m, mean; PRL, prolactin.