ISBN: 978-94-6419-895-9 Copyright © 2023 Lieke J.J.J. Vrouenraets All rights reserved. No part of this publication may be reproduced, stored or transmitted in any way or by any means without prior permission of the author, or when applicable, of the publishers of the scientific papers. Cover design and lay-out: Douwe Oppewal, Printing: Gildeprint Enschede, The research described in this thesis was supported by a grant from the ‘Netherlands Organization for Health Research and Development’ (ZonMW, projectnumber 731010002), ‘Alliantie Fonds’ of Amsterdam Public Health, and ‘Fonds Wetenschappelijk Onderzoek Seksualiteit’ (FWOS, projectnumber 18.008). Financial support for the costs associated with the publication of this thesis was provided by Sander van ‘t Noordende and Ferring B.V.