Agarwal 2016.

Methods	2‐arm no treatment‐controlled randomised trial.
Participants	Women with a history of 2 or more consecutive miscarriages of unknown cause, aged between 21 and 40 years with euthyroid state and normal thyroid function tests. Women with a history of repeated miscarriage of known cause will be excluded.
Interventions	200 mg oral micronized progesterone, given twice daily until 16 weeks of gestation versus no treatment
Outcomes	Miscarriage
Notes	Evidence of trial documentation and data requested from the corresponding author, but no response was received by the time of publication of this review.