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Month of birth by zygosity in the NAS-NRC twin registry.
Acta Genet Med Gemellol (Roma) 1983; 32(2):113-6AG

Abstract

Previous results regarding a seasonality of twin births have been conflicting. Since the biology of monozygotic (MZ) twinning differs from that of dizygotic (DZ) twinning, it is possible that the seasonality of birth for these two twin types might differ. However, all previous studies examining the seasonality of birth by zygosity has estimated zygosity by Weinberg's method. In this report, the month of birth of all MZ and DZ veteran twins from the United States National Academy of Sciences-National Research Council (NAS-NRC) Twin Registry are compared with that found for an unselected group of veterans. Zygosity in the registry has been individually assigned to all twin pairs by a well-validated method. Compared to unselected veterans, the distribution of births by months did not differ significantly for all the veteran twin pairs or for the MZ and DZ twin pairs considered separately. The distribution of month of birth of the MZ and DZ twin pairs did not differ significantly from one another. These results are not consistent with a significant seasonality of MZ, DZ, or all twin births in the United States.

Authors

No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

6650099

Citation

Kendler, K S., and C D. Robinette. "Month of Birth By Zygosity in the NAS-NRC Twin Registry." Acta Geneticae Medicae Et Gemellologiae, vol. 32, no. 2, 1983, pp. 113-6.
Kendler KS, Robinette CD. Month of birth by zygosity in the NAS-NRC twin registry. Acta Genet Med Gemellol (Roma). 1983;32(2):113-6.
Kendler, K. S., & Robinette, C. D. (1983). Month of birth by zygosity in the NAS-NRC twin registry. Acta Geneticae Medicae Et Gemellologiae, 32(2), pp. 113-6.
Kendler KS, Robinette CD. Month of Birth By Zygosity in the NAS-NRC Twin Registry. Acta Genet Med Gemellol (Roma). 1983;32(2):113-6. PubMed PMID: 6650099.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Month of birth by zygosity in the NAS-NRC twin registry. AU - Kendler,K S, AU - Robinette,C D, PY - 1983/1/1/pubmed PY - 1983/1/1/medline PY - 1983/1/1/entrez SP - 113 EP - 6 JF - Acta geneticae medicae et gemellologiae JO - Acta Genet Med Gemellol (Roma) VL - 32 IS - 2 N2 - Previous results regarding a seasonality of twin births have been conflicting. Since the biology of monozygotic (MZ) twinning differs from that of dizygotic (DZ) twinning, it is possible that the seasonality of birth for these two twin types might differ. However, all previous studies examining the seasonality of birth by zygosity has estimated zygosity by Weinberg's method. In this report, the month of birth of all MZ and DZ veteran twins from the United States National Academy of Sciences-National Research Council (NAS-NRC) Twin Registry are compared with that found for an unselected group of veterans. Zygosity in the registry has been individually assigned to all twin pairs by a well-validated method. Compared to unselected veterans, the distribution of births by months did not differ significantly for all the veteran twin pairs or for the MZ and DZ twin pairs considered separately. The distribution of month of birth of the MZ and DZ twin pairs did not differ significantly from one another. These results are not consistent with a significant seasonality of MZ, DZ, or all twin births in the United States. SN - 0001-5660 UR - https://www.unboundmedicine.com/medline/citation/6650099/Month_of_birth_by_zygosity_in_the_NAS_NRC_twin_registry_ L2 - https://ClinicalTrials.gov/search/term=6650099 [PUBMED-IDS] DB - PRIME DP - Unbound Medicine ER -