3. Results
The total number of deliveries in the study period was 45,166, of which
1.92% (n = 869) were twin pregnancies. Of these 295 twin pregnancies
with the first twin in vertex presentation and meeting the study
criteria, 30.16% (n = 89) were in the VB group, while the remaining
69.84% (n = 206) were in the CB group. In the VB group, all the first
twins with vertex presentation were delivered via VB, while of the
second twins, 82.03% (n = 73) were delivered by VB, and the remaining
17.97% (n = 16) were delivered via CB. The distribution of all births
that included twins during this period is summarized in Figure 1.
A comparison of the demographic characteristics of the two groups is
shown in Table 1. The VB and CB groups presented the following average
respective results: maternal age 32.28±5.19 and 32.36±5.24; gravida
2.55±1.12 and 2.58±1.90; parity 1.57±1.13 and 1.61±1.91; BMI (kg/m2)
23.7 ± 4.7 and 24.7 ± 4.6; in vitro fertilization 47.19% (n = 42) and
49.5% (n = 102). The failure of intrauterine maneuvers was most
frequently observed for cesarean indication of the second twin (n=6,
37.5%) (Table 2).
A comparison of the clinical characteristics of the two groups is shown
in Table 3. When comparing the groups, VB and CB presented the following
respective results; birth weight of first twin 2370±441 g and 2362±374
g; birth weight of second twin 2363±414 g and 2361±403 g; five-minute
APGAR of first twin 9.13±0.74 and 9.11±0.89; five-minute APGAR of second
twin 8.81±1.77 and 8.90±1.18; rate of second twin’s five-minute
APGAR<7 5.6% (n = 5) and 3.9% (n = 8); birth trauma 1.12%
(n = 1) and 1.45% (n =3) (p˃0.05). For the remaining characteristics,
the VB and CB groups presented the following respective results: ENMR
2.24% (n = 2) and 0.97% (n = 2). These results were considered
statistically significant (p = 0.006). When considering the distribution
of early neonatal death cases in the two death cases in both the VB and
the CB group occurred in the preterm groups. In addition, these four
neonatal death cases were the vertex presentation, dichorionic
diamniotic, did not have intrauterine growth retardation and inter-twin
weight discordance too.