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Abbreviation : OS
Long Form : opposite-sex
No. Year Title Co-occurring Abbreviation
2020 Opposite-sex and same-sex twin studies of physiological, cognitive and behavioral traits. SS, TTT
2018 Risk of epilepsy in opposite-sex and same-sex twins: a twin cohort study. CIs, HRs, SS
2018 Why are there more same-sex than opposite-sex dizygotic twins? SS
2017 Does the sex of one's co-twin affect height and BMI in adulthood? A study of dizygotic adult twins from 31 cohorts. BMI, CI, CODATwins, SS
2017 Early-life mortality risks in opposite-sex and same-sex twins: a Danish cohort study of the twin testosterone transfer hypothesis. SS, TTT
2016 A National Swedish Twin-Sibling Study of Alcohol Use Disorders. AUD
2016 Contrasting effects of opposite- versus same-sex housing on hormones, behavior and neurogenesis in a eusocial mammal. BLA, DG, NMR, SS
2016 Differences in Religiousness in Opposite-Sex and Same-Sex Twins in a Secular Society. RCOPE, SS
2016 Primary tooth size asymmetry in twins and singletons. DA, DZ, FA, MZ
10  2015 Academic performance of opposite-sex and same-sex twins in adolescence: A Danish national cohort study. CAH, SS
11  2015 Risk of Sex-Specific Cancers in Opposite-Sex and Same-Sex Twins in Denmark and Sweden. CI, SIR, SS
12  2014 A comparison of anthropometric, metabolic, and reproductive characteristics of young adult women from opposite-sex and same-sex twin pairs. FT12, FT16, SS
13  2013 Association of twinning and maternal age with major structural birth defects in Utah, 1999 to 2008. AORs, SS
14  2013 Statistical analyses of monozygotic and dizygotic twinning rates. DZ, MZ, SS, WDR
15  2012 Multivariate genetic analyses of cognition and academic achievement from two population samples of 174,000 and 166,000 school children. SS
16  2011 Influence of having a male twin on body mass index and risk for dyslipidemia in middle-aged and old women. BMI
17  2008 Males do not reduce the fitness of their female co-twins in contemporary samples. SS
18  2008 Prenatal hormone exposure and risk for eating disorders: a comparison of opposite-sex and same-sex twins. DE, SS
19  2006 Finger-length ratios show evidence of prenatal hormone-transfer between opposite-sex twins. SS
20  2005 Is there an effect of prenatal testosterone on aggression and other behavioral traits? A study comparing same-sex and opposite-sex twin girls. SS
21  2005 Maternal serum steroid levels are unrelated to fetal sex: a study in twin pregnancies. ---
22  2005 The relative importance of genetic and environmental factors in the aetiology of thyroid nodularity: a study of healthy Danish twins. DZ, MZ
23  2004 Major genetic influence on the regulation of the pituitary-thyroid axis: a study of healthy Danish twins. DZ, MZ
24  2004 Prenatal exposure to testosterone and functional cerebral lateralization: a study in same-sex and opposite-sex twin girls. DLT, SS
25  2002 Childhood parental loss and risk for first-onset of major depression and alcohol dependence: the time-decay of risk and sex differences. AD, MD, NPH, PH, SS
26  2002 Gender differences in the genetic factors responsible for variation in bone density and ultrasound. BMD, DXA, QUS
27  2002 The Korean Twin Registry--methods, current stage, and interim results. LS, VSD
28  1999 Increased tooth crown size in females with twin brothers: Evidence for hormonal diffusion between human twins in utero. SS
29  1999 Peers, teachers and parents as assessors of the behavioural and emotional problems of twins and their adjustment: the Multidimensional Peer Nomination Inventory. DZ, MPNI, SS
30  1992 The current status of Weinberg's differential rule. SS
31  1990 Twinning in families of triplets. SS
32  1987 The monozygotic twinning rate: is it really constant? SS