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
Primiparous
0 (0)
(73.7)
Multiparous
56 (100)
(26.3)
ART
4 (7.1)
26 (68.4)
<0.001
Prior preterm birth or second trimester loss
56 (100)
2 (5.3)
<0.001
Prior cervical surgery
4 (7.1)
1 (2.6)
0.65
BMI
24.7 (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 tocolytics
22 (39.3)
21 (55.3)
0.14
Use of vaginal progesterone
56 (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.