Effects of Type of Placentation on Birthweight and its Variability in Monozygotic and Dizygotic Twins
- 1 January 1979
- journal article
- research article
- Published by Cambridge University Press (CUP) in Acta geneticae medicae et gemellologiae: twin research
- Vol. 28 (1) , 41-50
- https://doi.org/10.1017/s0001566000009326
Abstract
Birthweight was measured on 188 monochorionic monozygotic, 54 dichorionic monozygotic, 102 like-sexed dizygotic, and 94 unlike-sexed dizygotic liveborn twin pairs. Overall, males were found to be significantly heavier than females. These differences were not significant, however, when birthweights were compared within zygosity/chorion-type categories. Males were also characterized by a slightly greater overall total variance. Comparisons of intrapair variation of monochorionic and dichorionic monozygotic twins revealed significant differences between monochorionic pairs and dichorionic separate pairs and no significant differences between monochorionic pairs and dichorionic fused pairs. The results of this study suggest that placental proximity may have as important an influence on variation in birthweight as does the presence or absence of vascular anastomoses.Keywords
This publication has 6 references indexed in Scilit:
- H-Y antigen and the growth of the dominant gonad.Journal of Medical Genetics, 1977
- ANALYSIS OF BIRTH WEIGHT, GESTATIONAL AGE, AND FETAL VIABILITY, U. S. BIRTHS, 1968Obstetrical & Gynecological Survey, 1974
- Genetics and Immunology of Sex-Linked AntigensPublished by Elsevier ,1972
- Importanza della Placentazione sul peso alla nascita dei GemelliActa geneticae medicae et gemellologiae, 1960
- A CONTRIBUTION TO THE STUDY OF BIRTH WEIGHT BASED ON AN ITALIAN SAMPLE TWIN DATAAnnals of Human Genetics, 1957
- THE INHERITANCE OF HUMAN BIRTH WEIGHT*Annals of Human Genetics, 1955