Ana Márcia de Miranda Cota, Elisa Lopes e Lages, Hérica Cristina Mendonça, Ana Luísa Ana Luísa, Maria Clara Magalhães dos Santos Amaral, João Pedro Junqueira Caetano
JBRA Assist. Reprod. 2011; 15 (5):22-25
Received April 20, 2011
Accepted May 02, 2011
Abstract
Objective: to evaluate the results of the vitrification of human blastocyst in the Clinic Pró Criar / Mater Dei.
Methods: It is an observational, retrospective and descriptive study. 292 patients who had submitted a frozen-thawed blastocyst cycle during the period
of January of 2007 the May of 2010 had been evaluated.
Results: The mean age of the women was 34,35 years. The mean number of vitrified and defrosted blastocyst for patient was 2,08 ± 0.87, totalizing 604 defrosted blastocyst. 482 blastocyst had survived, with a survival rate of 80%. The average number of blastocyst transferred was 1,63 ± 0.77. 57,53% patients had had the blastocysts frozen in Day 5 and 42,47% in Day 6. The global pregnancy rate for thawed cycle was 44,5%. The clinical pregnancy rate for transfer was 48%. There was no statistical difference in pregnancy rate when Day 5 and Day 6 were compared.
Conclusion: the vitrification of blastocyst is an efficient technique, with high survival rate, that allows the storage of the exceeding embryos with a high pregnancy rate in thawed cycles.
