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. Author manuscript; available in PMC: 2022 Dec 20.
Published in final edited form as: J Hum Lact. 2019 Apr 29;36(1):136–145. doi: 10.1177/0890334419838225

Table 2.

Plasma Levels of OXT, PRL, and AVP in New Breastfeeding Healthy Women (Day 4–5).

Time 1 (start of feeding) n = 32 Time 2 (20 min later) n = 31 Change (Time 2–Time 1) n = 30 Paired t-test t p
OXT (pg/ml)
 M (SD) 1641.5 (121.7) 1713.6 (127.2)   89.6 (120.0) −4.1 <.001
 Median (Min, Max) 1634.4 (1381.2, 1867.8) 1695.6 (1452.6, 1956.6)   85.2 (−174.6, 429)
PRL (ng/ml)
 M (SD) 311.81 (113.6)   340.0 (106.2)   26.2 (57.7) −2.5   .009
 Median (Min, Max)   306.5 (77, 652)   344.0 (166.0, 650.0)     2 (−28, 228)
AVP (pg/ml)
 M (SD) 1996.5 (294.6) 1900.7 (302.1) −112.36 (412.1)   1.49   .07
 Median (Min, Max) 2018.1 (1548.6, 2772.0) 1958.4 (1434.6, 2605.8) −69.6 (−1147.9, 870.6)

Note. PRL = prolactin; OXT = oxytocin; AVP = arginine vasopressin.