Letrozole and metformin versus letrozole alone for ovulation induction in women with polycystic ovarian syndrome: a randomised controlled trial. Pyramid Journal of Medicine, [S. l.], v. 9, n. 1, 2026. DOI: 10.4081/pjm.2026.514. Disponível em: https://africa.pagepress.net/pjm/article/view/514. Acesso em: 1 jun. 2026.