More commonly, lost twins are discovered as tiny mummified attachments to the placenta of the live twin, after it is born.
更常见的是死去的孪生儿变成了微小的干尸，当存活婴儿出生的时候，附在其胎盘上。
2
Twin to twin Transfusion Syndrome (TTTS) and other complications of monochorionic (Shared placenta) twin pregnancies like unequal placental sharing are generally diagnosed by ultrasound.
双胞胎输血综合症以及其他单绒毛膜双胞胎怀孕的并发症，比方胎盘分配不均等，普通都是经过超声诊断的。
3
Methods One hundred and fourty-one women with high hemorrhagic risk factors including twin pregnancy, polyhydramnios, fetal macrosomia, placenta previa were planned cesarean section.