. 2011 Feb;127(2):e359–e366. doi: 10.1542/peds.2010-1627

TABLE 1.

Baseline Characteristics of Subjects in r-hPRL Trials

Study Group	Time After Birth, Mean (Range), wk	Milk Production, Mean (Range), mL/d^a	Serum Prolactin Level, Mean (Range), μg/L^b
Study Group	Time After Birth, Mean (Range), wk	Milk Production, Mean (Range), mL/d^a	Baseline	Peak
Study 1: prolactin-deficient mothers (N = 5)	12.4 (5–39)	3.4 (0–8)	11.1 (0–34.5)	27.9 (0–93.1)
Study 2: lactation-insufficient mothers of premature infants (N = 10)	11.3 (3.5–39)	190 (0–726)	33.2 (5.7–178)	107 (8.4–308)

Normal milk volume is 749 to 1181 mL/day.⁵⁷

Normal baseline and peak serum prolactin levels from birth to 7 weeks after birth are 13 to 95 μg/L and 122 to 370 μg/L, respectively.²⁴ Prolactin-deficient mothers were defined on the basis of a low baseline or peak prolactin level, or both.