| Date | Event | Description |
|---|---|---|
| 2 March 2015 | New citation required but conclusions have not changed | Searches updated |
| 4 August 2014 | Amended | Summaries of evidence quality (Table 9) and outcomes (Table 10) and a sensitivity analysis (Table 11) added |
| 31 July 2014 | New search has been performed | 7 trials (Heikkilä 1982; Shaamash 2005; Brito 2009; Gurtcheff 2011; Espey 2012; Dutta 2013; Stuart 2014) and 1 ongoing trial (Turok 2014) added |
| 14 July 2014 | Amended | Types of outcome measures separated into primary (effect on lactation) and secondary (contraceptive efficacy). Trials must report a primary outcome; Were 1997 determined to be no longer eligible (Excluded studies) |
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