letrozole 2.5 mg vs 5mg?

Effect of letrozole at 2.5 mg or 5.0 mg/day on ovarian stimulation with gonadotropins in women undergoing intrauterine insemination
Affiliations
PMID: 18083169 DOI: 10.1016/j.fertnstert.2007.08.060
Abstract
Objective: To determine the effect of combined therapy of letrozole (2.5 mg or 5.0 mg) with recombinant follicle-stimulating hormone (FSH) in comparison with