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monochorionic twins

   Also found in: Dictionary/thesaurus, Legal, Encyclopedia, Wikipedia 0.03 sec.
twin (twin) one of two offspring produced in the same pregnancy and developed from one oocyte (monozygotic) or from two oocytes (dizygotic) fertilized at the same time.
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Twins. (A), The most common type of monozygotic twinning, with division of the inner cell mass of the blastocyst resulting in separate amnions but a single chorion and placenta; (B), a rare form of monozygotic twinning, with complete division of the embryonic disc resulting in two embryos in a single amniotic sac with a single placenta and chorionic sac; (C), monozygotic twinning with division occurring between the two-cell and morula stages to produce identical blastocysts, resulting in separate amniotic and chorionic sacs and either separate (shown) or fused placentas; (D,E), dizygotic twinning, with (D) or without (E) fusion of the placenta and chorion.
allantoidoangiopagous twins  twins united by the umbilical vessels only.
conjoined twins  monozygotic twins whose bodies are joined to a varying extent.
diamniotic twins  twins developing within separate amniotic cavities; they may be monochorionic or dichorionic.
dichorionic twins  twins having distinct chorions, including monozygotic twins separated within 72 hours of fertilization and all dizygotic twins.
dizygotic twins , fraternal twins, heterologous twins twins developed from two separate oocytes fertilized at the same time.
identical twins  monozygotic t's.
impacted twins  twins so situated during delivery that the pressure of one against the other prevents simultaneous engagement of both.
monoamniotic twins  twins developing within a single amniotic cavity; they are always monozygotic and monochorionic.
monochorionic twins  twins developing with a single chorion; they are always monozygotic and may be monoamniotic or diamniotic.
monozygotic twins  two individuals developed from one fertilized oocyte; they have identical genomes.
omphaloangiopagous twins  allantoidoangiopagous t's.
Siamese twins  conjoined t's.
similar twins  monozygotic t's.
Monochorionic twins
Twins that share a single placenta.
Mentioned in: Prenatal Surgery
monochorial twins, monochorionic twins.


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In addition, fetal MRI has been used in other complicated monochorionic twins at risk for a possible neurologic ischemic episode, such as cases complicated by the twin-twin transfusion syndrome and cases that have undergone invasive prenatal procedures, such as selective reduction using cord ablative techniques.
Advances in prenatal diagnosis by Cleary-Goldman, Jane; Malone, Fergal / Applied Radiology
Conjoined twins result from incomplete separation of monozygotic, monochorionic twins early in embryonic development, resulting in body parts of the otherwise normal twins remaining fused throughout development.
The legacy of Ladan and Laleh by Thompson, Richard E. / Physician Executive
 
 
 
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