Cited by 31Functional Brain Connectivity StudiesAdvanced Neuroimaging Techniques and ApplicationsSex and Gender in Healthcare

Robust sex differences in functional brain connectivity are present in utero

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Cook, Kevin M, De Asis-Cruz, Josepheen, Lopez, Catherine, Quistorff, Jessica, Kapse, Kushal, Andersen, Nicole, Vezina, Gilbert, Limperopoulos, Catherine·2023·Cerebral Cortex

Abstract

Sex-based differences in brain structure and function are observable throughout development and are thought to contribute to differences in behavior, cognition, and the presentation of neurodevelopmental disorders. Using multiple support vector machine (SVM) models as a data-driven approach to assess sex differences, we sought to identify regions exhibiting sex-dependent differences in functional connectivity and determine whether they were robust and sufficiently reliable to classify sex even prior to birth. To accomplish this, we used a sample of 110 human fetal resting state fMRI scans from 95 fetuses, performed between 19 and 40 gestational weeks. Functional brain connectivity patterns classified fetal sex with 73% accuracy. Across SVM models, we identified features (functional connections) that reliably differentiated fetal sex. Highly consistent predictors included connections in the somatomotor and frontal areas alongside the hippocampus, cerebellum, and basal ganglia. Moreover, high consistency features also implicated a greater magnitude of cross-region connections in females, while male weighted features were predominately within anatomically bounded regions. Our findings indicate that these differences, which have been observed later in childhood, are present and reliably detectable even before birth. These results show that sex differences arise before birth in a manner that is consistent and reliable enough to be highly identifiable.

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Crossref · 10.1093/cercor/bhac218

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Authors
Cook, K. M., De Asis-Cruz, J., Lopez, C., Quistorff, J., Kapse, K., Andersen, N., Vezina, G., & Limperopoulos, C.
Affiliations
  • Children's National (US)
  • Developing Brain Institute , Children’s National, 111 Michigan Ave NW, Washington DC 20010 , USA
  • Division of Diagnostic Imaging and Radiology , Children’s National, 111 Michigan Ave NW, Washington DC 20010 , USA
Corresponding author
Limperopoulos, Catherine
Venue
Cerebral Cortex
Published
2022-05-31
Volume
33
Issue
6
Pages
2441-2454
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W4281722012
Cited by
31
References
106
Citations by year
2026: 7 · 2025: 10 · 2024: 6 · 2023: 7 · 2022: 1
FWCI
3.09
Type
journal article
Language
en
Open access
Locations
  • Cerebral Cortex (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Canadian Institutes of Health Research (MOP-81116)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (T32-HD098066)
  • National Heart, Lung, and Blood Institute (R01-HL116585)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Sex and Gender in Healthcare
Keywords
sex differences, fetal brain, brain functional connectivity, sex classification, fetal sex determination, resting-state fMRI, somatomotor cortex, frontal cortex, hippocampus, cerebellum, basal ganglia, fetal development, neurodevelopmental disorders
MeSH terms
Brain, Brain Mapping, Cognition, Female, Humans, Magnetic Resonance Imaging, Male, Sex Characteristics

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