2/02/04 Ultrasound can reveal identical twin... -
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Published on: 1/31/2004
Last Visited: 1/31/2004
The method may be able to determine twins' zygosity more than 30 weeks before birth, said principal investigator Dr. Stephen Tong, an ob/gyn clinician at Monash University in Clayton, Victoria.
The ultrasound technique could establish whether twins are identical (monozygotic) or nonidentical (dizygotic) in almost all cases of spontaneous twin pregnancy between four and nine weeks of gestation, Tong said.
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Along with several potential clinical applications, social and psychological implications should also be accounted for, Tong said.The International Society for Twin Studies, founded in Rome in 1974, states that parents have a right to expect accurate recording of placentation zygosity diagnosis of same-sex twins.Their similar biology affects their development, and they are blood and organ donors of choice for their siblings.
"Twins have a right to know their zygosity, and it is likely that they use this information to shape their identities," Tong said.