Optimized protocol for cryopreservation of human eggs improves developmental competence and implantation of resulting embryos

Table 4 Summary of egg vitrification and warming in the non-donor patients *

Case	Age	No. of oocytes survived	No. of oocytes fertilized	No. of zygotes cleaved	No. of embryos transferred	Clinical pregnancy	Ongoing pregnancy	No. of embryos implanted
1	39	6/7	6	4	Blast x2	No	No	0
2	30	4/4	3	3	Blast x2	Yes	Yes	1
3	39	9/10	6	5	Blast x2 (2)**	Yes	Yes	1
4	34	10/10	8	8	Blast x2	Yes	No	1
5	36	4/4	4	4	Blast x2	Yes	Yes	1
6	29	8/8	7	7	Blast x2 (1)**	Yes	Yes	2
Total		41/43	34	31	13 (15)***	5	4	6
%		95.3	82.9	91.2	48.4	83.3	66.7	46.2

*Eggs were vitrified with the long protocol.
**Numbers in the parentheses are the spare blastocysts for cryopreservation.
***Number in the parentheses is the total number of blastocysts (transferred and cryopreserved).

ISSN: 1757-2215