Telimaa 1988(a).

Methods	Random allocation. Method not described.
Participants	Endometriosis, all stages, at laparoscopy; infertility duration unspecified.
Interventions	Provera 100 mg daily for 6 months, n=17 patients randomised and included versus placebo daily for 6 months, n=14 patients randomised and included.
Outcomes	Clinical pregnancy, diagnosis not defined; data reported by stage of disease.
Notes	Up to 30 months post‐treatment follow up; 3‐arm trial; approximately 1/3 patients in each arm received treatment or placebo after conservative surgery. Pregnancy data not separable for medical treatment alone. Co‐intervention with electrocautery at laparoscopy in 9 women and clomiphene in 11 women, but these treatments were evenly distributed across allocation groups. ITT analysis done. Funding: drugs supplied by Farmos Group Ltd Turku, Finland. Note that this is the same study as Telimaa 1988 (b).
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	'Randomly allocated' no further details provided.
Allocation concealment?	Unclear risk	Unclear; no details provided.
Blinding? All outcomes	High risk	No details of blinding.
Incomplete outcome data addressed? All outcomes	Low risk	Data reported on all women.
Free of selective reporting?	High risk	Not followed up to live birth.