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The presence of a "T-sign" at the inter-twin membrane-placental junction is indicative of monochorionic-diamniotic twins (that is, the junction between the inter-twin membrane and the external rim forms a right angle), whereas dichorionic twins present with a "lambda (λ) sign" (that is, the chorion forms a wedge-shaped protrusion into the ...
There is no sign of any membrane between the fetuses. A coronal plane is shown of the twin at left, and a sagittal plane of parts of the upper thorax and head is shown of the twin at right. Ultrasound is the only way to detect monoamniotic-monochorionic twins before birth. [4]
Twin anemia-polycythemia sequence (TAPS) is a chronic type of unbalanced fetal transfusion in monochorionic twins that results in polycythemia in the TAPS recipient and anemia in the TAPS donor due to tiny placental anastomoses. [1] Post-laser TAPS and spontaneous TAPS are the two forms of TAPS.
Monochorionic twins are twins that share the same placenta. This occurs in 0.3% of all pregnancies, [3] and in 75% of monozygotic (identical) twins, when the split takes place on or after the third day after fertilization. [4] The remaining 25% of monozygous twins become dichorionic diamniotic. [4]
The acardiac twin is a parasitic twin that fails to properly develop a heart, and therefore generally does not develop the upper structures of the body. The parasitic twin, little more than a torso with or without legs, receives its blood supply from the host twin by means of an umbilical cord-like structure (which often only has two blood vessels, instead of three), much like a fetus in fetu ...
SEE ALSO: Mother horrified after learning what heart symbol on daughter's stuffed toy really meant A FBI document obtained by Wikileaks details the symbols and logos used by pedophiles to identify ...
Twin-to-twin transfusion syndrome (TTTS), also known as feto-fetal transfusion syndrome (FFTS), twin oligohydramnios-polyhydramnios sequence (TOPS) and stuck twin syndrome, is a complication of monochorionic multiple pregnancies (the most common form of identical twin pregnancy) in which there is disproportionate blood supply between the fetuses.
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