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There has not been conclusive evidence in literature on the efficacy of progestogen in the treatment of threatened miscarriage, although some studies showed benefits. In our centre, threatened miscarriage is treated with either micronised progesterone (MP) or dydrogesterone (DYD).

The aim of this study is to compare clinical outcomes of miscarriage, extent of vaginal bleeding at follow-up and side effects between treatment groups.

This study was a prospective parallel-group, open-label, randomized controlled trial. 141 women presenting with threatened miscarriage were randomised to either MP or DYD of which 118 were included in the analysis. Baseline maternal demographics and serum progesterone levels were collected at presentation. Post-treatment bleeding pattern and self-reported side effects were recorded at the follow-up visit (on day 4–10 of treatment). The occurrence of …