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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 ...
Monoamniotic twins are identical or semi-identical twins that share the same amniotic sac within their mother's uterus. [1] Monoamniotic twins are always monochorionic and are usually termed Monoamniotic-Monochorionic ("MoMo" or "Mono Mono") twins. [1] [2] They share the placenta, but have two separate umbilical cords.
Superfecundation is the fertilization of two or more ova from the same cycle by sperm from separate acts of sexual intercourse, which can lead to twin babies from two separate biological fathers. [1] [2] The term superfecundation is derived from fecund, meaning able to produce offspring.
"The couple was told they were having mono mono twins, meaning the babies shared the same amniotic sac and placenta. The odds of this type of pregnancy [are] one in 10,000 births."
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ANKENY, Iowa -- After more than a week in hospital rare twins born in Des Moines are heading home. WHO TV reports: We first introduced you to Shelby Magnani and her fiancé James Croskey last week.
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 ...
"The rate of triplets or higher is only 80 in 100,000 births. Additionally, to have two sets of identical twins, meaning that both embryos split after fertilization, makes it even more rare."