New users can subscribe to this publication throughout the SGO Keep and non-customers can subscribe instantly with the journal publisher, Elsevier. If you have any issues accessing your online subscription, remember to Call Elsevier directly. The trial registration selection (TRN), date of registration and also the text 'retrospectively registered’ ought https://www.directivepublications.org/journal-of-clinical-obstetrics-and-gynecology-research/