[shash]

The question is why is the embryo not “fit enough”. One way to increase the chance of success is by making the embryo “more fit”, but that requires an understanding of what that definition of fitness is, and that is what I understand this study is about.

[colechristensen]

The genetic recombination process often results in failure, shuffling genes around and associated mutations breaks important things and the embryo gets to the point where it can no longer survive. It is sort of the first filter in evolution, surviving the single-cell to infant process.

[nomel]

This is making an extreme assumption that miscarriages aren't an expected, or required, phenomenon.

[shash]

No assumptions. Just a different way to study a phenomenon...