Liang YM 2017.

Study characteristics
Methods	RCT, single centre, 60 participants, 1 year duration
Participants	60 enrolled: CHM = 30, control = 30, 20 to 40 years, baseline was comparable 60 analysed/evaluated: CHM = 30, control = 30 PCOS DC: consistent with Rotterdam criteria (evaluated by review authors) In: PCOS and infertility Ex: using other drugs for ovulation induction, participants unable to follow‐up, tumour patients, adrenal diseases, non‐ovulatory infertility, other hyperandrogenic diseases
Interventions	CHM + CC versus CC CHM: bu shen huo xue decoction (day 5 of menstrual cycle, one dose per day, decocted in water, bid, 3 weeks), clomiphene (day 5 of menstrual cycle, 50 mg, once a day, 5 days) Control: clomiphene (day 5 of menstrual cycle, 50 mg, once a day, 5 days) Duration: 3 menstrual cycles (stop treatment when pregnancy was founded); follow‐up three months
Outcomes	Pregnancy rate Ovulation rate (per cycle) BMI, sex hormones, blood lipid
Notes	This is a dissertation.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Random number table
Allocation concealment (selection bias)	Unclear risk	Failed to obtain this information from the author
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Failed to obtain this information from the author
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Failed to obtain this information from the author
Incomplete outcome data (attrition bias) All outcomes	Low risk	No withdrawal or dropout
Selective reporting (reporting bias)	Unclear risk	The study protocol was unavailable
Other bias	Low risk	No other potential risk of bias identified