Ultrasound-Indicated Cerclage in Twin Pregnancies: A Cohort Study

Table 5

Comparison of pregnancy outcomes based on singleton or twin pregnancy with preoperative cervical  mm.

Pregnancy outcome study population ()	Singleton pregnancy ()	Twin pregnancy ()	value
GA at cerclage (weeks)	21.5 (16.4–23.6)	21.3 (17.2–23.4)	0.91
GA at delivery (weeks)	35.1 (25.5–40.4)	32.5 (23.6–37.4)	0.24
Preoperative cervical length (mm)	9.0 (4.0–13.6)	10.0 (3.5–15.0)	0.46
Postoperative cervical length (mm)	27.4 (11.7–40.4)	25.0 (17.7–41.8)	0.81
Cerclage to delivery interval (days)	83 (23–152)	82 (20–115)	0.43
Preterm delivery
<34 weeks	12 (41.4)	12 (57.1)	0.39
<32 weeks	12 (41.4)	9 (42.9)	1
<28 weeks	6 (20.7)	3 (14.3)	0.72
<24 weeks	2 (6.9)	1 (4.8)	1

Data are expressed as medians (ranges) and number (percentage). , which means statistical difference. GA: gestational age.