NCT02305693.

Trial name or title	Comparison between letrozole and LOD in women with clomiphene‐resistant PCOS
Methods	Randomised controlled trial, parallel‐assignment
Participants	Inclusion criteria: 20 to 40 years, clomiphene‐resistant PCOS women Exclusion Criteria: Other causes of infertility, hyperprolactinaemia, BMI > 35, previous letrozole or LOD
Interventions	LOD versus Letrozole 2.5 mg
Outcomes	Primary outcome measures: ovulation Secondary outcome measures: pregnancy
Starting date	November 2014
Contact information	AbdelGany MA Hassan, Cairo University, Egypt
Notes