OP04.01: The fetal cardiovascular response to an increased placental vascular resistance (PVR) measured with STIC and VOCAL

the left lung, and R2 = 0,937 to the total lung volume). The lung volume also proved to be highly related to fetal weight (R2 = 0,905 to the right lung, R2= 0,84to the left lung, and R2 = 0,908 to the total lung volume). The intra-observer variability study was of 0,990 for the right lung, 0,986 for the left lung, and 0,995 for the total lung volume. The value of Cronbach Alfa Coefficient to evaluate the inter-observer variability was 0,975 for the right lung, and 0,962 for the left lung. Conclusion: the fetal lung volume measurement by VOCAL method of 3-dimensional unltrasonography shows good reproducibility and can be utilized to evaluate fetal lung growth.