Over the past 30 years, ultrasound examination during pregnancy revealed a surprising variety of fetus movements. It has been proven that the fetal activity begins at the end of the embryo period, week 7—9 of gestation. The analysis of the movemental patterns of the fetus has led to the hypothesis that these patterns directly reflect the development and maturation of the central nervous system. The 2D-4D ultrasound makes it possible to identify measurable parameters for assessing the neurological and behavioural development ofthe fetus. Multicentre studies were performed to identify normal and abnormal movements of the fetus. Having analysed the obtained data, the authorspropose a set of criteria for assessing the fetus neurological behaviour, allowing clinicians to better predict neurological outcome of a high-risk pregnancy.