Study design and overview
Infertility
INFERTILITY
This study employed a randomized controlled trial design. It was conducted at the Infertility and Reproductive Biology Unit of the Department of Obstetrics and Gynecology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand, from November 2020 to December 2021. Eligible participants were randomly allocated to a “combination group” or a “CC-alone group” after Institutional Review Board approval. Those assigned to the combination group received a daily dose of CC (50 mg) and letrozole (2.5 mg), whereas participants in the CC-alone group were administered a daily dose of CC alone (50 mg) [