Introduction of the form „Report on Parturient“ in 1991 as a part of National Health Information System and annual national analyses of the data contributed to the improvement of obstetrical care. Such improvement impacted on decrease of maternal and perinatal mortality. Advances in obstetrical diagnostic procedures during last 8 years and new WHO form Basic Information Sheet (BIS), recommended for use in Europe for unified recording of selected indicators of perinatal care, created need to innovate the „Report on Parturient“. The 5 - year development of the WHO BIS under the international WHO Project OBSQID (two workers from the WHO Collaborating Center of the Institute for the Care of Mother and Child contributed to that activity) is described. Also, the collaboration with the Office of Health Statistics and Information, which resulted in innovation of „Report on Parturient“ is mentioned. The new form „Report on Parturient“ compa- tible with the WHO BIS will come to use the 1 st of January 2000.

        Key words: national analyses, perinatal mortality