Deakin University
Browse
craig-birthsizeandgestational-2018.pdf (1.11 MB)

Birth size and gestational age in opposite-sex twins as compared to same-sex twins: An individual-based pooled analysis of 21 cohorts

Download (1.11 MB)
Version 2 2024-06-04, 13:35
Version 1 2018-07-10, 11:09
journal contribution
posted on 2024-06-04, 13:35 authored by Aline Jelenkovic, Reijo Sund, Yoshie Yokoyama, Yoon-Mi Hur, Vilhelmina Ullemar, Catarina Almqvist, Patrik Ke Magnusson, Gonneke Willemsen, Meike Bartels, Catharina Em van Beijsterveldt, Leonie H Bogl, Kirsi H Pietiläinen, Eero Vuoksimaa, Fuling Ji, Feng Ning, Zengchang Pang, Tracy L Nelson, Keith E Whitfield, Esther Rebato, Jeffrey CraigJeffrey Craig, Clare H Llewellyn, Abigail Fisher, Gombojav Bayasgalan, Danshiitsoodol Narandalai, Morten Bjerregaard-Andersen, Henning Beck-Nielsen, Morten Sodemann, Adam D Tarnoki, David L Tarnoki, Syuichi Ooki, Maria A Stazi, Corrado Fagnani, Sonia Brescianini, Lise Dubois, Michel Boivin, Mara Brendgen, Ginette Dionne, Frank Vitaro, Tessa L Cutler, John L Hopper, Robert F Krueger, Matt McGue, Shandell Pahlen, Richard Saffery, Claire Ma Haworth, Robert Plomin, Ariel Knafo-Noam, David Mankuta, Lior Abramson, S Alexandra Burt, Kelly L Klump, Robert F Vlietinck, Catherine A Derom, Ruth Jf Loos, Dorret I Boomsma, Thorkild IA Sørensen, Jaakko Kaprio, Karri Silventoinen
It is well established that boys are born heavier and longer than girls, but it remains unclear whether birth size in twins is affected by the sex of their co-twin. We conducted an individual-based pooled analysis of 21 twin cohorts in 15 countries derived from the COllaborative project of Development of Anthropometrical measures in Twins (CODATwins), including 67,850 dizygotic twin individuals. Linear regression analyses showed that boys having a co-twin sister were, on average, 31 g (95% CI 18 to 45) heavier and 0.16 cm (95% CI 0.045 to 0.274) longer than those with a co-twin brother. In girls, birth size was not associated (5 g birth weight; 95% CI -8 to -18 and -0.089 cm birth length; 95% CI -0.202 to 0.025) with the sex of the co-twin. Gestational age was slightly shorter in boy-boy pairs than in boy-girl and girl-girl pairs. When birth size was standardized by gestational age, the magnitude of the associations was attenuated in boys, particularly for birth weight. In conclusion, boys with a co-twin sister are heavier and longer at birth than those with a co-twin brother. However, these differences are modest and partly explained by a longer gestation in the presence of a co-twin sister.

History

Journal

Scientific Reports

Volume

8

Article number

6300

Location

London, Eng.

Open access

  • Yes

ISSN

2045-2322

eISSN

2045-2322

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2018, The Authors

Publisher

Nature Publishing Group

Usage metrics

    Research Publications

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC