Figure 1.

The survival percentage and developmental competence of vitrified-thawed preantal follicles. Comparison of the survival percentage and developmental competence of preantal follicles frozen-thawed by using the vitrification method of dropping on the surface of a metal plate vitrification method in 2 μl droplets (n = 115), 6 μl droplets (n = 114), and unfrozen control group (n = 127). The preantral follicles were derived by isolation from 14-day-old mouse ovaries. Means with different letters for each end points were significantly different (P < 0.05).