Human Uterine Microvascular Endothelial Cells (HUMECs) from Creative Bioarray are isolated from the uterus tissue of healthy donors. The cells are cryopreserved at Passage 2 and delivered frozen. Each vial contains at least 0.5 *10^6 cells. The cells are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast and fungi. HUMECs are guaranteed for at least 15 population doublings under the conditions provided by Creative Bioarray. Repeated freezing and thawing of cells is not recommended.