The aim of this study was to determine the relationship between-the nu
mber of coils in the umbilical cord and perinatal outcome. The umbilic
al cords and delivery records of 147 liveborn neonates were prospectiv
ely studied. The umbilical coiling index (UCI) of each cord was calcul
ated by dividing the total number of complete umbilical vascular coils
by the umbilical cord length, Subjects with UCIs below the 10th perce
ntile, above the 90th percentile, and between the 10th and 90th percen
tiles were defined as hypocoiled, hypercoiled, and normocoiled, respec
tively. Several different parameters were used to measure neonatal out
come. The mean UGI was 0.20+/-10 (SD). No relationship was noted betwe
en UCI and maternal age, gravidity, parity, oligohydramnios, or birth
weight, When we compared the hypocoiled group (n=30) with the normocoi
led group (n=87), we detected a statistically significantly higher inc
idence of meconium staining, interventional delivery, apgar scores, fe
tal blood pH and intrapartum fetal heart rate disturbances, As a resul
t, we concluded that the UCI has a strong relationship with perinatal
outcome and may be used antenatally as a marker for identifying the fe
tus at risk.