Journal of Human Reproductive Science
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ORIGINAL ARTICLE Table of Contents   
Year : 2009  |  Volume : 2  |  Issue : 1  |  Page : 23-26
Blastocyst stage transfer vs cleavage stage embryo transfer

Reproductive Medicine Unit, Christian Medical College Hospital, Vellore - 632 004, Tamil Nadu, India

Correspondence Address:
Korula George
Reproductive Medicine Unit, Christian Medical College Hospital, Vellore - 632 004, Tamil Nadu
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0974-1208.51339

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Objective: To evaluate the efficacy of blastocyst transfer in comparison with cleavage stage embryo in a similar cohort of women. Design: Retrospective analysis. Setting: University teaching hospital. Materials and Methods: Women aged 35 or less undergoing in vitro fertilization/intracytoplasmic sperm injection between January 2005 and December 2006 were included in the study. When four or more grade 1 embryos were observed on day 3, extended culture till day 5 was undertaken. This policy was compared with a cohort of women who had at least three grade 1 embryos on day 3 and who had undergone a cleavage stage embryo transfer during the time period of January 2002-December 2004. Primary outcome evaluated was implantation rate and clinical pregnancy rate. Results: Group 1 consisted of 50 women who underwent extended culture and blastocyst transfer. Group 2 comprised of 85 women who had cleavage transfer. The implantation rate for embryos transferred in group 1 was significantly higher than that for embryos transferred on day 3 (40.16% vs 11.43%). The clinical pregnancy rate was also significantly better with blastocyst transfer as compared with cleavage stage transfer (62% vs 29.76%). Significantly fewer embryos were required for transfer at the blastocyst stage compared with day 3 transfer (2.54 vs 3.45). Conclusion: In selected cases, blastocyst transfer with fewer embryos can be performed with high implantation and clinical pregnancy rates. This policy could lead to a reduction in the incidence of higher-order pregnancies.

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