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| Methods | Randomised controlled trial. |
| Participants | 31 pregnant women with mechanical heart valves at their first trimester (0‐14 weeks) of pregnancy. |
| Interventions | LMWH versus UFH. |
| Outcomes | Fetal loss. |
| Notes | This study was identified in the updated search (18 Feb 2021) and will be incorporated into this review at the next update. |
