Fig. 3: Cerebrospinal fluid (CSF) endogenous (d0) oxytocin (OT) concentrations: time course of d0OT in monkey cerebrospinal fluid (CSF) at baseline (Time = 0) and after intranasal (IN) d5OT 80 and 40 IU; after intravenous (IV) d5OT 80 and 40 IU.
From: Labeled oxytocin administered via the intranasal route reaches the brain in rhesus macaques

Limit of quantification = 10 pg/ml.