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University of Groningen

Two sides to every story

Beking, Tess

IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below.

Document Version

Publisher's PDF, also known as Version of record

Publication date: 2018

Link to publication in University of Groningen/UMCG research database

Citation for published version (APA):

Beking, T. (2018). Two sides to every story: Sex hormones, brain lateralization and gender development. Rijksuniversiteit Groningen.

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Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum.

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TWO SIDES TO EVERY STORY

SEX HORMONES, BRAIN LATERALIZATION

AND GENDER DEVELOPMENT

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The research described in this thesis was supported by:

NWO – Research Talent Grant (grant number 406-13-101) The Heymans Institute, University of Groningen

GELIFES, University of Groningen

Center of Expertise on Gender Dysphoria, VU Medical Center Amsterdam School of Behavioural and Cognitive Neuroscience (BCN), University of Groningen

Publication of this thesis was financially supported by:

University of Groningen (RuG)

School of Behavioural and Cognitive Neuroscience (BCN), University of Groningen MedCat BV, The Netherlands

Compumedics DWL, Germany

Artwork: Tess Beking (beking.tess@gmail.com) Design cover and interior: Ramon Vermij & Tess Beking

Ramon Vermij – Communication & Design www.ramonvermij.com Printed by Ridderprint BV, Ridderkerk

ISBN 978-94-034-0985-6 (printed version) ISBN 978-94-034-0984-9 (electronic version) Copyright © Tess Beking, 2018

All rights reserved. No part of this publication (including the artwork) may be reproduced, stored or transmitted in any form or by any means without prior written permission of the author.

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Two sides to every story

Sex hormones, brain lateralization and gender development

Proefschrift

ter verkrijging van de graad van doctor aan de

Rijksuniversiteit Groningen

op gezag van de

rector magnificus prof. dr. E. Sterken

en volgens besluit van het College voor Promoties.

De openbare verdediging zal plaatsvinden op

donderdag 11 oktober 2018 om 14.30 uur

door

Tess Beking

geboren op 1 december 1988

te Apeldoorn

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Promotores

Prof. dr. A.G.G. Groothuis Prof. dr. O.M. Tucha

Copromotores

Dr. R.H. Geuze Dr. B.P.C. Kreukels

Beoordelingscommissie

Prof. dr. E.A. van der Zee Prof. dr. A. Aleman Prof. dr. I. McManus

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CONTENTS

Introduction 9 Investigating effects of steroid hormones

on lateralization of brain and behaviour 23

Prenatal and pubertal testosterone affect brain lateralization 57 Prenatal and pubertal estradiol affect brain lateralization in girls 87 Testosterone effects on amygdala lateralization:

a study in transboys and adolescent controls 97

Prenatal and pubertal sex hormones predict human gender-related

preferences - a longitudinal study from 13 months to 15 years of age 117 Discussion 147 Summary 167 Samenvatting 175 Dankwoord 183 List of conferences 186 List of co-authors 187 List of data 188 Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Cahpter 10

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continued

into

puberty

and for

the rest

of her life

Check out Tess’ YouTube video:

“Mind hormones in the brain”

This started

before she

was born

This thesis investigates the influence of sex hormones

(testosterone and estradiol) before birth and in adolescence on:

1

The division of functions between the left and

right side of the brain (called lateralization).

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This is Tess

She has

tosterone

“male

hormones”

and

estradiol

“female

hormones”

both impact

her brain

and thereby her behaviour

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