Hefny 2018.

Study characteristics
Methods	Placebo‐controlled double‐blind randomised clinical trial
Participants	Infertile women attending an Obstetrics and Gynaecology clinic. Women with PCOS undergoing timed intercourse (Mean age = ?) (N = 200) Inclusion criteria: PCOS infertile women Exclusion criteria: Unknown
Interventions	1. Clomiphene citrate 100 mg/day plus NAC 1.2 g/day (N = ?)) 2. Clomiphene citrate 100 mg/day plus placebo (N = ?) Treatment for 5 days starting at day 3 of the cycle
Outcomes	The number of follicles > 18 mm on the day of hCG administration Ovulation rates The mean endometrial thickness Pregnancy No adverse side‐effects and no cases of OHSS were observed in the group receiving NAC
Notes	Conference abstract Location: Obstetrics and Gynaecology, El Hussein University Hospital, Cairo, Egypt Timeframe: Unkown Trial registration number: Unkown Informed consent: Unkown Ethical approval: Unkown Sample size power calculation: Unkown Funding: Unkown Conflict of interests:Unkown ITT: Unkown Author email: Unkown and unable to find
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "Randomly divided"
Allocation concealment (selection bias)	Unclear risk	Unknown
Blinding (performance bias and detection bias) All outcomes	Low risk	Quote: "Placebo‐controlled double‐blind"
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Unknown
Selective reporting (reporting bias)	Unclear risk	Trial registration number not available
Other bias	Unclear risk	Conference abstract ‐ baseline characteristics unclear