The incidence of Horner's syndrome during lumbar extradural for elective Caesarean section and provision of analgesia during labour.

One hundred and fifty women in labour provided with extradural analgesia were monitored and an incidence of Horner's syndrome of 1.33% was noted. Fifty women undergoing Caesarean section under extradural analgesia were also monitored and an incidence of Horner's syndrome of 4% was noted. From the results we found it impossible to predict which patients would develop a Horner's syndrome.