Circumvallate Placenta: Associated Clinical Manifestations and Complications—A Retrospective Study
Table 2
Comparison of pregnancy outcomes between circumvallate placenta and control groups.
Circumvallate placenta ()
Control ()
value
Gestational week at delivery (week)
32.8 (22.1–41.7)
38.2 (22.1–42.6)
<0.01
Extremely preterm delivery*
29 (31.5%)
214 (2.4%)
<0.01
Preterm delivery
59 (64.1%)
1069 (11.8%)
<0.01
VB during the 1st trimester
30 (32.6%)
85 (0.9%)
<0.01
VB during the 2nd trimester
36 (39.1%)
53 (0.6%)
<0.01
Subchorionic hematoma
14 (15.2%)
93 (1.0%)
<0.01
pPROM
36 (39.1%)
362 (4.0%)
<0.01
PCROM
19 (20.6%)
3 (0.03%)
<0.01
Oligohydramnios
22 (23.9%)
177 (2.0%)
<0.01
Placental abruption
10 (10.9%)
120 (1.3%)
<0.01
Delivery modality
Normal vaginal delivery
42 (45.6%)
6397 (70.6%)
<0.01
Instrumental delivery
3 (3.2%)
419 (4.6%)
0.53
Elective cesarean section
4 (4.3%)
1062 (11.7%)
0.03
Emergency cesarean section
42 (45.6%)
1180 (13.0%)
<0.01
Extremely preterm delivery: delivery at gestational age between 22 weeks 0 days and 27 weeks 6 days. VB: vaginal bleeding; pPROM: preterm premature rupture of membranes; PCROM: premature chemical rupture of membranes; PIH: pregnancy-induced hypertension.
