Uncategorized Delta-like ligand 4 regulates vascular endothelial growth factor receptor 2-driven luteal angiogenesis through induction of a tip/stalk phenotype in p Igenomix Leucine-rich repeat-containing G-protein-coupled receptor 5 (Lgr5) as a putative human endometrial stem cell marker The endometrial receptivity array for diagnosis and personalized embryo transfer as a treatment for patients with repeated implantation failure.