The intrapartum management of multiple gestation continues to challenge the obstetrics profession. Electronic fetal heart rate monitoring and fetal pulse oximetry are used in clinical research to assess fetal well-being during labor. The objective of this study was to establish values of fetal arterial oxygen saturation (FSpO2) and some other parameters by dint of computerised analysis of cardiotocogram during twin delivery. 5 cases of vaginal twin deliveries as the Clinic of Perinatology of the Institute of Gynecology and Obstetrics Lodz Mecical University over the years 1988-1999 were reviewed. In four cases vertex-vertex twins were delivered vaginally, while in one case an assisted breech extraction was conducted on vertex-non vertex twins. The foetus was monitored continually with a Oxford S 8000 systems and pulse oximeter Nellcor N-400. the medium parameters of computerised analysis of CTG and FSpO2 during progressive stages of labour were shown. Twin delivery needs modern fetal monitoring tools to provide the obstetrician information on well-being of the foetus. It is possible to monitor fetal oxygen saturation and CTG parameters in both of the twins during labour The ability to measure fetal oxygen saturation especially during the second stage of twin labor adds critical information about fetal status and refines the interpretation of abnormal FHR patterns. Only after examining a large number of twin fetuses we can assess whether pulse oximetry in useful in management of labor.