Impact Factor
2.46
Journal Citation Impact
Estimated influence, citation density, publishing volume, and citation integrity from the analytics table.
Citation rate
1.32
126 total citations
h5-index
11
h5 depth signal
Cited share
50.0%
49 of 98
Total citations
126
Citation footprint
Metric signal
1.00
External metric anchor
Self-citation
5.6%
7 self-citations
Citations Trend
Monthly Publications Cadence
Citing Geographic Demographics
United States
245
Australia
150
Netherlands
79
China
61
United Kingdom
57
Citing Fields of Research
Genetics & Genomics
324
Human Reproduction
203
Psychiatry & Psychology
148
Obstetrics/Gynecology
112
Psychiatry
70
Publishing Activity & Reach
Volume, recency, access pattern, and citing-community signals from the journal analytics record.
All-time article footprint
1,952
Articles tracked across the journal lifetime
Indexed publication set
98
49 cited publications
Last 12 months
74
6.2 publications/month
Open access share
71.6%
53 OA publications in the last year
Leading citing country
United States
245 citing publications
Leading citing field
Genetics & Genomics
324 citing publications
Latest tracked publication
13 October 2026
10 recent records available
Coverage & Indexing History
v8n1, Feb. 2005-
v8n1, Feb. 2005-
Research Focus & Classification
Indexed Subjects
Genetics & Genomics
Human Reproduction
Obstetrics/Gynecology
Psychiatry & Psychology
Issuing & Sponsoring Bodies
Contributor
International Society for Twin Studies
Broad Categories
Genetics, Medical
Human Reproduction
Genetics & Genomics
MeSH Descriptors
Genetics
Multiple Birth Offspring
Twins
Latest Publications
Recent article records with DOI-first linking and condensed abstracts.
01
DOI 10.1017/thg.2026.10106
Open DOI
Identifying Potential Drug Targets for Treating ADHD From a Genetic Perspective: A Mendelian Randomization Study
Attention-deficit/hyperactivity disorder (ADHD) is a chronic neurodevelopmental disorder. Current pharmacological treatments have limitations, highlighting the need for new therapeutic targets. Using two-sample Mendelian randomization wi...
02
DOI 10.1017/thg.2026.10097
Open DOI
Does ADHD Moderate Classroom-Level Effects on Early Literacy?
Prior literature using twin pairs in the same or different classes found classroom effects accounted for between 8% and 2−3% of the variability in literacy achievement depending on the method, grade, or measure used. The current study ex...
03
DOI 10.1017/thg.2026.10099
Open DOI
Are Socioeconomic Status and Time in Preschool Mediators of Shared Environment Variance in Reading Ability?
While socioeconomic status (SES), time in preschool (TiP) and their interaction are related to reading ability, the results have been mixed. This study assessed whether the shared environment mediated these associations using a longitudi...
04
DOI 10.1017/thg.2026.10096
Open DOI
Estimating the Heritability of Intelligence with a Nuclear Twin Family Design
Intelligence, and the favorable life outcomes with which it is associated, are not shared equally between individuals or groups. In an endeavor to better understand the inequality, behavioral genetics (BG) have employed the classical twi...
05
DOI 10.1017/thg.2026.10085
Open DOI
THG volume 29 issue 4 Cover
THG volume 29 issue 4 Cover - Volume 29 Issue 4
06
DOI 10.1017/thg.2026.10094
Open DOI
Population-Level Data Linkages in Worldwide Twin Research Resources
Twin registries are foundational resources for research in behavioral and medical genetics, epidemiology, and public health. Over several decades, successive international reviews have documented their expansion in number, geographical c...
07
DOI 10.1017/thg.2026.10095
Open DOI
Neonatal Health and Long-Term Outcomes: Twin-Based Evidence From Linked Scandinavian Registers
This study examines the long-term consequences of neonatal health using three birth anthropometric measures — weight, length, and head circumference — and analyzes their differential associations with outcomes across the life course. Usi...
08
This article summarizes events at two June 2026 twin conferences held in different Brazilian cities. The first one took place at the State University of Londrina, in the state of Paraná; the second one took place at the University of São...
09
10
DOI 10.1017/thg.2026.10093
Open DOI
Fetal Growth Disorders in Dichorionic Diamniotic IVF Twin Pregnancies: A Retrospective Longitudinal Cohort Study
Growth disorders are common in in vitro fertilization (IVF)-conceived twins, but risk factors specific to dichorionic-diamniotic twins remain incompletely characterized. This study aimed to assess these risk factors. Data from in vitro f...
Bibliographical & Catalog Notes
Title from cover.
Also issued online.