continuous monitoring of the foetal electrocorticogram , eye movements and heart rate in ewes during the last month of gestation showed rapid placental transfer from the mother to the foetus of phenothiazine derivatives ( acepromazine maleate ) , short-acting barbiturates ( thiopental sodium ) and narcotic analgesics ( meperidine ) .
C0032961
gestation
C0025376
meperidine