It is intriguing to speculate that disruption of maternal/fetal tolerance in dichorionic
discordant pregnancies is a trigger that activates the common pathway of labor.
pregnancies, the prospective weekly pooled risk of stillbirths from expectant management and the risk of neonatal mortality from delivery were balanced at 37 weeks of gestation (risk difference, 1.2/1,000, 95% CI, -1.3 to 3.6; [I.sup.2] = 0%).
In this period of time, we analyzed pregnancies with dichorionic
twins after exclusion from the analysis: monochorionic twin pregnancies, monoamniotic twins, intrauterine fetal demise of one twin during second trimester, twins with structural anomalies, pregnancies resulting in selective reduction, and pregnancies with incomplete outcome information.
In cases of monochorionic twins selective cord occlusion is done, and in cases of dichorionic
twin pregnancies intra-cardiac potassium injection is used.
Results: Of the 394 cases, 84(21.3%) were monochorionic diamniotic twins and 310(78.7%) were dichorionic
Prenatal diagnosis of a complete mole coexisting with a dichorionic
twin pregnancy: case report.
Survival after the loss of a co-twin is also associated with a 25% incidence of neurologic injury, compared with a 2% incidence in dichorionic
Boy K's mother was referred to Maternal Fetal Medicine for previous dichorionic
diamniotic twin gestation with demise of one twin at 8 weeks gestation and maternal anti-e, anti-K1 (Kell), and anti-C antibodies discovered during the prenatal antibody screen.
At 11 to 14 weeks, the presence of the "lambda sign," a triangular projection of tissue that extends from the chorionic surface, is indicative of a dichorionic
pregnancy, while a "T sign" suggests a monochorionic pregnancy (sensitivities 97%-100%; specificities 98%-100%).
More studies are needed, and thus the aim of this study was to look into the neonatal outcomes of monochorionic twin pregnancies including the gestational age of delivery and to compare it with dichorionic
If successful, the pregnancy is thereafter functionally dichorionic
(with independent circulations), and risk of serious sequelae of twin-twin transfusion syndrome (neurologic damage, morbidity, and mortality) is reduced.
At the routine 12 week (NT) scan, the membrane inserts into the placenta in a 'T' shape whereas in the dichorionic
situation, where a peak of placental tissue rises between the membranes, this is a '[lambda]' shape.