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Clinical outcome of day 2 versus day 3 embryo transfer using serum-free culture media: A prospective randomized study



Clinical outcome of day 2 versus day 3 embryo transfer using serum-free culture media: A prospective randomized study



Journal of Assisted Reproduction and Genetics 16(10): 529-534



Purpose: The objective was to evaluate whether extending the embryo culture period from 2 to 3 days would yield a more optimal selection of viable embryos, thereby increasing the implantation and live birth rates. Methods: Patients undergoing in vitro fertilization with at least one oocyte fertilized were prospectively randomized to 2 or 3 days of embryo culture in serum-free media. On the basis of their morphology and cleavage rate, a maximum of three embryos was selected for transfer. Results: Embryos transferred on day 2 or day 3 were similar morphologically, however, a higher proportion of retarded embryos was observed on day 3. The implantation rate was 15.8 and 14.3% for day 2 and day 3 transfers, respectively. The increase in live birth rate from 18.5 to 22.6%, possibly suggesting a better embryo selection on day 3, was not statistically significant. Conclusions: Extending the embryo culture period from 2 to 3 days had no effect on implantation and live birth rates.

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Accession: 010331330

Download citation: RISBibTeXText

PMID: 10575581

DOI: 10.1023/a:1020597104326


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