Administration of corifollitropin alfa on Day 2 versus Day 4 of the cycle in a GnRH antagonist protocol: a randomized controlled pilot study. - Blockeel, C; Polyzos, N P; Derksen, L; De Brucker, M; Vloeberghs, V; van de Vijver, A; De Vos, M; Tournaye, H (Human Reproduction, 2014)