In embryo culture is more or less oxygen better?

This is one of a series of news items from abstracts of studies presented at the Annual Meeting of the American Society for Reproductive Medicine as complied by Dr. David Meldrum, Scientific Director of Reproductive Partners. We appreciate the enormous amount of work it takes to compile and comment on these abstracts.


In a poster presentation outcomes using 5% O2 and 21% O2 were compared. 5% O2 was associated with better embryos, higher blastocyst rate, more high quality embryos cryopreserved, and a higher implantation rate. Along with other studies and our own observation of more advanced embryos, over the last 10 years this single change in embryo culture at RPMG has given our patients an edge compared with other programs which were slow to make this change or have not yet modified their culture system. 

So with embryo culture, less is better.