Umbilical cord coiling index is defined as a number of coils per one centimetre of length of the cord. The normal index is one coil for a length of five centimetres. If the number of coils is more per centimetre it is called as a hypercoiled and less than it is called as a hypocoiled umbilical cord. This index plays an important role in predicting the pregnancy outcome and risk of low birth weight.
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