: 45–57  TCM focuses on tracing and correcting underlying disharmony, in terms of deficiency and excess, using the complementary and opposing forces of yin and yang  (陰陽), to create a balanced flow of qi. Qi is believed to be cultivated and stored in three main dantian energy centers and to travel through the body along twelve main meridians (Jīng Luò 經絡), with numerous smaller branches and tributaries. The main meridians correspond to twelve main organs ) (Zàng fǔ 臟腑). Qi is balanced in terms of yin and yang in the context of the traditional system of Five Phases (Wu xing 五行). A person is believed to become ill or die when qi becomes diminished or unbalanced. Health is believed to be returned by rebuilding qi, eliminating qi blockages, and correcting qi imbalances. These TCM concepts do not translate readily to modern science and medicine. Daoism
In Daoism, various practices now known as Daoist qigong are claimed to provide a way to achieve longevity and spiritual enlightenment, as well as a closer connection with the natural world. Buddhism
In Buddhism meditative practices now known as Buddhist qigong are part of a spiritual path that leads to spiritual enlightenment or Buddhahood. Confucianism
In Confucianism practices now known as Confucian qigong provide a means to become a Junzi (君子) through awareness of morality. Contemporary qigong
In contemporary China, the emphasis of qigong practice has shifted away from traditional philosophy, spiritual attainment, and folklore, and increasingly to health benefits, traditional medicine and martial arts applications, and a scientific perspective.
A nuchal cord was diagnosed if the cord was visualized lying around at least 3 of the 4 sides of the neck. A cord was actually present at delivery in 52 of the 289 women. Only 18 of the 52 cords or 35% of the nuchal cords were detected on ultrasound done immediately before delivery, and 65% of nuchal cords were not detected. Of the 237 cases where there was no cord at delivery, ultrasound had false positive results, i.e. diagnosed a cord in 44 of the 237 cases (19%) in which there was no cord present at all. In this study, ultrasound was only 35% accurate at finding a single loop, and only 60% accurate at detecting a nuchal cord wrapped multiple times around the neck.In no study was it possible by ultrasound to distinguish between a loose or a tight cord, although at least 3 attempted to do so. Peregrine concludes that ultrasound diagnosis of nuchal cords will only be useful if doctors are able to do so reliably and predict which of those fetuses are likely to have a problem., However, perinatologists routinely look for umbilical cord issues in monoamniotic twins. Studies have shown an improvement in outcomes where cord entanglement was prenatally identified in these cases. Ultrasound measurement of the velocity of flow in the cord may be useful in the management of twins and chronically growth-retarded fetuses. Of course this depends on the training of the sonographer.