Maternal *Vasa previa *Rupture of the vessels and membranes *Small placenta *Low arterial<unk>  pH *Vascular thrombosis *Intrapartum bleeding *Umbilical<unk>  avulsion *Need for caesarean delivery, curettage, manual extraction of the placenta *Placental abruption *Postpartum hemorrhage Fetal *Prematurity *Abnormal heart rate patterns *Low birth weight *Newborn/s small for gestational age *Low Apgar score *Fetal hypoxia *Pulmonary complications *Fetal malformations *Fetal bleeding *Death In twins, one or both of the fetuses may have<unk> , which can lead to birth-weight discordance, where one twin weighs significantly more at birth than the other, and selective fetal growth restriction. These complications particularly arise in the case of monochorionic twins, where identical twins share the same placenta.
Velamentous cord insertion
Neural clique
Vaginal septum
Uterine septum
Fetal movement
Placental expulsion
Peritomy
Circumvallate placenta