Fig 1. Effect of superovulation induced by eCG or IASe treatment on the viability and yield of vitrified–warmed oocytes.

A) The number of ovulated oocytes per oocyte donor was counted after removing the cumulus cells. B) The number of surviving oocytes per oocyte donor was counted after vitrifying and warming. C) The rate of survival of oocytes (%) was calculated as the number of morphologically normal oocytes divided by the sum of morphologically normal and dead oocytes × 100. Morphologically normal oocyte (D) and dead oocyte (E) after vitrifying and warming are shown. The results are expressed as mean ± SD (n = 5). *P < 0.05 compared with eCG.