success with blast that didnt make it to blast until day 6?

[Anonymous]

My most recent cycle had 0 day 5 blasts, and 11 day 6 blasts...apparently our embryos are just a little slow to grow. From what I've read, there is a perhaps a slightly higher risk of chromosomal issues, but not all of the studies indicate this, so I'd say its inconclusive at this point. We are doing PGS testing, and a day 6 PGS tested embryo has the same chance of success as a day 5 PGS tested embryo.

There were a couple of articles I read - these are some of them:
http://www.fertstert.org/article/S0015-0282(04)01895-3/abstract
http://www.fertstert.org/article/S0015-0282(13)02123-7/fulltext
http://www.ncbi.nlm.nih.gov/pubmed/25043891