[1] Ben Gurion Univ Negev, Barzilai Govt Hosp, Dept Obstet & Gynecol, IVF Unit, Ashqelon, Israel
[2] Ben Gurion Univ Negev, Barzilai Govt Hosp, Dept Obstet & Gynecol, Ultrasound Unit, Ashqelon, Israel
[3] Illinois Masonic Med Ctr, Inst Reprod Genet, Chicago, IL 60657 USA