Table 3: Distribution frequencies of the three groups according to the maternal factors.

Normal ( 𝑁 = 9 0 1 )Preterm ( 𝑁 = 9 9 ) 𝑃 value

Hypocoiled97 (10.8%)20 (20.2%)0.004*
Normocoiled718 (79.7%)65 (65.7)
Hypercoiled86 (9.5%)14 (14.1%)0.060

UCINormal ( 𝑁 = 9 8 7 )Abruption ( 𝑁 = 1 3 ) 𝑃 value

Hypocoiled112 (11.3%)5 (38.5%)0.019*
Normocoiled775 (78.5%)8 (61.5%)
Hypercoiled100 (10.1%)0 (0%)0.310

UCI Normal ( 𝑁 = 9 5 0 )Oligohydramnios ( 𝑁 = 5 0 ) 𝑃 value

Hypocoiled105 (11.1%)12 (24.0%)0.013*
Normocoiled749 (78.8%)34 (68.0%)
Hypercoiled96 (10.1%)5 (27.8%)0.015*

UCINormal ( 𝑁 = 9 5 0 )Polyhydramnios( 𝑁 = 5 0 ) 𝑃 value

Hypocoiled113 (11.5%) 4 (22.2%)0.076
Normocoiled774 (78.8%)9 (50.0%)
Hypercoiled95 (9.7%)5 (27.8%)0.015*