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In vitro development and pregnancy outcomes for human embryos cultured in either a single medium or in a sequential media system. | LitMetric

AI Article Synopsis

Article Abstract

Objective: To compare a single medium, with medium renewal on day 3, with a sequential media system for development of human embryos to the blastocyst stage and subsequent pregnancy outcome.

Design: Prospectively randomized study using donor oocytes.

Setting: Private infertility clinic.

Patient(s): Oocytes were collected from 47 donors (mean +/- SD age = 25.6 +/- 3.5 years) from March to October 2006 and used for 79 patients (40.6 +/- 5.4 years). The patients were prospectively randomized to have their embryos cultured in a single medium or in a sequential media system.

Intervention(s): The donor oocytes were fertilized with fresh patient partner sperm and the resultant zygotes cultured in either a single medium or a sequential media system from day 1 until the blastocyst stage. After endometrial preparation the embryos were transferred to the patients on day 5 or day 6.

Main Outcome Measure(s): In vitro embryo developmental characteristics and pregnancy and implantation rates.

Result(s): In vitro development rates on days 3, 4, and 5 and implantation rates were significantly greater for embryos cultured in the single medium than for those cultured in the sequential media system.

Conclusion(s): A single medium was as good as or better than a sequential media system for human embryo culture from the zygote to blastocyst stage. The idea that a sequential media system is required for optimal development of the human embryo to the blastocyst stage is highly questionable.

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Source
http://dx.doi.org/10.1016/j.fertnstert.2008.02.169DOI Listing

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