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Revista Peruana de Ginecología y Obstetricia

On-line version ISSN 2304-5132


REYNA-VILLASMIL, Eduardo et al. Cervical vascularization low he in the prediction of imminent preterm labor. Rev. peru. ginecol. obstet. [online]. 2022, vol.68, n.3, 00004.  Epub Sep 22, 2022. ISSN 2304-5132.


To establish the usefulness of cervical vascularization low he in the prediction of impending preterm labor.


Case-control study. Institution: “Dr. Urquinaona” Central Hospital, Maracaibo, Venezuela.


Patients with preterm delivery within 7 days (group A) and pregnant women with preterm delivery beyond 7 days (group B).


Pregnant women were evaluated using transvaginal ultrasound and followed until delivery.

Main outcome measures:

General characteristics, cervical vascularity low he (vascularity index, low index and vascularity / low index), impending preterm delivery, and prognostic efficacy.


A total of 350 patients were included, 75 women presented imminent preterm labor (group A) and 251 patients were considered as controls (group B). Patients in group A had significantly lower values of vascularization index and low index compared to group B (p = 0.0122 and p < 0.0001, respectively). Patients in group B had significantly higher values of vascularization / low index compared to patients in group A (p = 0.0103). The three low he and the combination of these did not show the ability to discriminate imminent preterm labor.


Patients with imminent preterm labor showed significant differences in the vascularization low he compared to patients presenting preterm labor beyond 7 days of ultrasound evaluation. However, they are not useful in predicting impending preterm labor.

Keywords : Cervix uteri, blood low, Cervical vascularization indexes; Obstetric labor, premature, prediction.

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