Divalent Cation Levels in Serum and Preovulatory Follicular Fluid of Women Undergoing in vitro Fertilization Embryo Transfer. - Azem, Foad; Hanannel, Arik; Wolf, Yoram; Ben-Yosef, Dalit; Wagman, Israel; Yovel, Israel; Kapustiansky, Rita; Lessing, Joseph B.; Maclov, Mira; Amit, Ami (Gynecologic & Obstetric Investigation, 2004)