1. Prospective randomized comparison of human oocyte cryopreservation with slow-rate freezing or vitrification 
Gary D. Smith, Ph.D., Paulo C. Serafini, M.D., Ph.D., Joyce Fioravanti, B.S., Isaac Yadid, M.D., Marcio Coslovsky, M.D., Pericles Hassun, Ph.D., D.V.M., José Roberto Alegretti, B.S., Eduardo L. Motta, M.D., Ph.D. 
Fertility and Sterility 
Volume 94, Issue 6, Pages (November 2010)
DOI: /j.fertnstert
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Representative photographs, micrographs, and sonograph of various aspects of oocyte vitrification, fertilization, embryo development and clinical pregnancies. (A) Photograph of closed-pulled straw system and (B) micrograph of oocytes within the narrow portion of a close-pulled straw which is ∼200 μm in diameter. (C) Representative micrograph of a viable oocyte at initial warming (T0). Oocyte diameter ∼135 μm. (D) Representative micrograph of a vitrified oocyte that is still viable 4 hours after warming (T4), just before ICSI. (E) Day 3 human embryo following oocyte vitrification/warming, insemination by ICSI, and embryo culture. This embryo was six-cell grade 2 (11%–20% fragmentation) and representative of average embryo morphology on day of transfer following oocyte warming. (F) Sonogram representing a 10-week twin clinical pregnancy following transfer of three embryos resulting from oocyte vitrification/warming.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions