Date	Event	Description
14 November 2019	Amended	We have made further amendments to this review to clarify the reasons for moving Ismail 2017 from Included to Characteristics of studies awaiting classification. We have edited text in results/studies awaiting classification', characteristics of studies awaiting classification, and published notes, in order to make the following information more visible. Since publication of the 2018 update of this review, we have been advised that the Ismail 2017 study is currently the subject of an investigation by the Journal of Maternal‐Fetal & Neonatal Medicine. We have now moved this study from 'included studies' to 'Characteristics of studies awaiting classification' until the outcome of the investigation is known.
16 October 2019	Amended	One study, previously included (Ismail 2017), has been moved to Characteristics of studies awaiting classification, pending clarification about the study data. We have added a Published notes to clarify that this review will no longer be updated in its current form.
6 July 2017	New citation required but conclusions have not changed	Title amended and focus of review changed from treatment of all miscarriage to treatment of recurrent miscarriage. This was done to eliminate treatment for threatened miscarriage as that is covered in a separate Review (Wahabi 2018). Five trials added (Agarwal 2016; Coomarasamy 2015; Ghosh 2014; Ismail 2017a; Kumar 2014); six trials previously included are now excluded (Berle 1980; Corrado 2002; Gerhard 1987; Moller 1965; Nyboe Anderson 2002; Tognoni 1980). They were excluded as they dealt strictly with women with threatened miscarriage or a different population. Co‐author added.
6 July 2017	New search has been performed	Search updated. 'Summary of findings' table incorporated
1 August 2013	New search has been performed	Search updated and four new trials identified. One was included (MacDonald 1972), two excluded (Kyrou 2011; Shu 2002), and one is ongoing (Coomarasamy 2012). Three previously included trials (Moller 1965a; Moller 1965b; Moller 1965c) are in fact three separate reports from one trial (Moller 1965a).
1 August 2013	New citation required but conclusions have not changed	No changes to conclusions.
12 May 2009	Amended	Contact details updated
11 February 2008	Amended	Converted to new review format
31 January 2008	New citation required but conclusions have not changed	This update has been prepared by a new review team.
31 January 2008	New search has been performed	Search updated. Four new trials identified: we included El‐Zibdeh 2005 and excluded Norman 2006. Two are ongoing (NCT00193674; Walch 2005). The inclusion of El‐Zibdeh 2005 narrows the confidence intervals (CI) of the outcomes it contained, including narrowing the CI for women with a history of three or more miscarriages; thus leading to the strengthening of the conclusions somewhat.