Twin zygosity and placentation

Autor: G. Corney, S. J. Strong, Elizabeth B. Robson
Rok vydání: 1968
Předmět:
Zdroj: Annals of Human Genetics. 32:89-96
ISSN: 1469-1809
0003-4800
Popis: Summary The relationship between placentation and zygosity is discussed in an unselected series of 326 twin births. Zygosity determinations were based on sex, red-cell antigens ABO, MNSs, Rh, Lua, K and Fa, the red-cell enzymes Ac. P., 6-PGD, PGM1 and AK and placental alkaline phosphatase. The results indicate that, whereas dizygotic twins are always dichorionic, between 15% and 20% of monozygotic twins may also be dichorionic. Tables are given which allow information on the enzyme phenotypes to be utilized in estimating the probability of dizygosity in the case of twin pairs alike for all characters tested, where the types of the parents are unknown.
Databáze: OpenAIRE
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