Fig. W6. Examples of EMG records from delivering (pup delivery indicated with black arrows) rat perfused with soluble progesterone (equivalent to 4 mg of authentic progesterone, P4, 4 mg at green arrow) as shown during 4 hours recording (top) and the same record shown enlarged with recording time equal to about 70 minutes. Note the perfusion with progesterone had no effect on the EMG activity.
