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Calculating blastocyst development rate
Michael L. Reed said on 30 October 2009

"I look at the data several ways, depending on the use of the data. If you are interested in total blastocyst rates, then calculating the rate from all fertilized ova is good - I believe that this measure is most often used for reporting in journals. I also break the data down further for cycles where embryos are replaced on day three or day five, as I believe that these cycles are very different in this practice. And if you are trying to predict development to day five, for example, using data from day three, then you could calculate blastocyst rates from the better quality embryos only. Periodically I'll identify three embryos on day three, that I would choose transfer if I were doing a day three transfer, and then track them to day five, to see if my choices were valid, to see how predictive my choices are, or are not.

With a spreadsheet or database program, you could do all of the above. Multiple metrics are good for troubleshooting.

Mike"

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