This study aims to find out if the drug antenatal corticosteroids (ACS) given to women with a twin pregnancy prior to a planned birth of twins after 35 weeks of pregnancy reduces breathing difficulties in the twin babies. Image Chief Investigator: Prof Sarah Stock/Dr Sarah Murray Number and location of participating sites: UK – 50 sites EudraCT number: 2021-002876-38 ISRCTN59959611 Funder: NIHR Start and End date Of grant award: 1 November 2021 - 31 October 2025 Of recruitment: Grant start date: 1 August 2022 - 31 April 2025 Current Status: Currently recruiting Website: www.stoppitstudy.co.uk UK GDPR Privacy Statement: information given within PIL consent Sponsor: ACCORD https://www.accord.scot/ Chief Investigator: Prof Sarah Stock Sarah.Stock@ed.ac.uk Dr Sarah Murray Sarah.Murray@ed.ac.uk Trial Manager: Denise Cranley Denise.Cranley@ed.ac.uk Research Midwife: Indira Kemp Indira.Kemp@ed.ac.uk Contact address: Edinburgh Clinical Trials Unit, Usher Building, The University of Edinburgh, 5‒7 Little France Road, Edinburgh BioQuarter ‒ Gate 3, EDINBURGH EH16 4UX ECTU Involvement: Trial management /Statistics/ Health Economics / Database and randomisation service. (UKCRC) This article was published on 2024-09-24