Beigi 2006.

Methods	RCT Setting: Iran Method of randomisation: unclear Blinding: unclear Number randomised: 70
Participants	Summary: metformin vs CC alone Inclusion criteria: PCOS based on a history of hyperandrogenism, anovulation, oligomenorrhoea or amenorrhoea, diagnostic US and laboratory findings Exclusion criteria: unclear Baseline characteristics of each group: metformin (n = 35) vs CC (n = 35) unclear Dropouts: unclear
Interventions	Main intervention: metformin 500 mg 3/d Duration: 6 months Co‐interventions: CC 50 mg 2/d from day 5‐9 of cycle
Outcomes	Ovulation: unclear how measured Others: live birth rate, miscarriage, clinical pregnancy, menstrual frequency
Notes	Only abstract found, contacted study authors to provide further information of methodology and results