The contemporary Portuguese feitiço may refer to more neutral terms such as charm, enchantment, or abracadabra, or more potentially offensive terms such as juju, witchcraft, witchery, conjuration or bewitchment. The concept was popularized in Europe circa 1757, when Charles de Brosses used it in comparing West African religion to the magical aspects of ancient Egyptian religion. Later, Auguste Comte employed the concept in his theory of the evolution of religion, wherein he posited fetishism as the earliest (most primitive) stage, followed by polytheism and monotheism. However, ethnography and anthropology would classify some artifacts of monotheistic religions as fetishes. The eighteenth-century intellectuals who articulated the theory of fetishism encountered this notion in descriptions of "Guinea" contained in such popular voyage collections as Ramusios Viaggio e Navigazioni (1550), de Brys India Orientalis (1597), Purchass Hakluytus Posthumus (1625), Churchills Collection of Voyages and Travels (1732), Astleys A New General Collection of Voyages and Travels (1746), and Prevosts Histoire generale des voyages (1748).The theory of fetishism was articulated at the end of the eighteenth century by G. W. F. Hegel in Lectures on the Philosophy of History.
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.