11. Frequency and mortality according to
the types of placentation
Diamniotic
DiChorionic
Separate
placentae
Diamniotic
DiChorionic
fused placentae
Diamniotic
MonoChorionic
single placentae
Monoamniotic
MonoChorionic
single placentae
Tần suất: 35% 27% 36% 2%
Tử suất: 13% 11% 32% 44%
05/03/16 11TS.BS.LeThiThuHa
48. Terata catadidyma:
conjunction in the lower part of the body
Ischiopagus: joined by inferior portion of coccyx and sacrum
Pygopagus: joined by lateral and posterior portion of coccyx and sacrum
05/03/16 48TS.BS.LeThiThuHa
49. Terata anadidyma:
conjunction in the upper part of the body
Syncephalus: joined by the face
Craniopagus: joined at homologous portion of the cranial vault
05/03/16 49TS.BS.LeThiThuHa
50. Terata anacatadidyma:
conjunction in the midpart of the body
Thoracopagus: joined at the thoracic wall
Xiphopagus: joined at xiphoid process
Omphalopagus: joined in the area between the xiphoid cartilage
and the umbilicus
Rachipagus: joined at he level of the spines above the sacrum
05/03/16 50TS.BS.LeThiThuHa
54. Song thai vôùi 1 baùnh nhau
• Nguy cô
– HC Truyeàn maùu cho nhau
– HC thuyeân taéc (1 thai cheát truyeàn cho
thai kia)
– Song thai dính
05/03/16 54TS.BS.LeThiThuHa
61. In the twin-reversed arterial perfusion syndrome the “acardiac” twin
is perfused retrogradely with poorly oxygenated blood that
should have gone to the placenta
05/03/16 61TS.BS.LeThiThuHa
62. Two sets of acardiac twins demonstrate the range of development
(or absence of development) of the cephalic end.
05/03/16 62TS.BS.LeThiThuHa