Sixty women at Colac and 30 at Horsham agreed to participle in the clinical study when they experienced severe back pain during their labour. Once they identified a need for the sterile water injection an assessment of pain severity using Visual Analogue Scale was undertaken immediatly pior to injection, five minute after and every 30 minute for up to three hour. The procedure involved the intradermal injection of 0.2-0.5 ml of sterile water into four sites in the Michaelis Rhomboid or lumbar-sacral region of the spine. Two midwives simultaneously injected to reduce the number of stinging sensations experienced by women.