Research Article

Ultrasound-Indicated Cerclage in Twin Pregnancies: A Cohort Study

Table 1

Comparison of baseline characteristics based on singleton or twin pregnancy.

Parameter study population ()Singleton pregnancy ()Twin pregnancy () value

Maternal age (years)34 (19–43)33 (25–38)0.01
Parity<0.001
 Primiparous0 (0) (73.7)
 Multiparous56 (100) (26.3)
ART4 (7.1)26 (68.4)<0.001
Prior preterm birth or second trimester loss56 (100)2 (5.3)<0.001
Prior cervical surgery4 (7.1)1 (2.6)0.65
BMI24.7 (18.1–33.5)24.1 (18.0–40.4)0.93
GA at cerclage (weeks)21.4 (16.4–23.6)21.4 (16.3–23.4)0.64
Use of tocolytics22 (39.3)21 (55.3)0.14
Use of vaginal progesterone56 (100)36 (94.7)0.08

Data are expressed as medians (ranges) and number (percentage). , which means statistical difference. ART: assisted reproductive technology; BMI: body mass index; GA: gestational age.