Accepted Article This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/jne.12736 This article is protected by copyright. All rights reserved. DR ROBERTO COSIMO MELCANGI (Orcid ID : 0000-0003-0861-8967) Article type : Original Article SEX DIFFERENCES IN THE BRAIN EXPRESSION OF STEROIDOGENIC MOLECULES UNDER BASAL CONDITIONS AND AFTER GONADECTOMY Silvia Giatti 1 , Silvia Diviccaro 1 , Luis Miguel Garcia-Segura 2,3 , Roberto Cosimo Melcangi 1* 1 Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy; 2 Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain; 3 Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain. *Corresponding author: Roberto Cosimo Melcangi, Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Italy, Via Balzaretti 9, 20133 Milano, Italy. Tel. +39- 02-50318238; Fax: +39-02-50318202. Email: roberto.melcangi@unimi.it Short Title: Neurosteroidogenesis and sex Keywords: male, female, cerebral cortex, cerebellum, neuroactive steroids