Fig. 2.

Time-Lapse imaging of 69 vitrified–warmed blastocysts. They were classified by whether they had shrunk or not at 5–6 h after warming. Moreover, shrunken blastocysts were classified according to whether they recovered or not by 5–6 h after warming. There was no significant change in the proportion of blastocysts that developed to the hatched stage between the expanded (26.9 %) and the shrinking blastocysts (33.3 %) at 5–6 h but there was a difference in the recovery rate before 5 h. On the other hand, the number of blastocysts that had not recovered by 5–6 h after warming and that developed to the hatched stage was zero