Poor embryo quality: The answer lies (mostly) in the egg.
Krey
L C
LC
Grifo
J A
JA
D000328:Adult; D000375:Aging; D002869:Chromosome Aberrations; D004624:Embryo Transfer; D004622:Embryo, Mammalian / Q000502:physiology*; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D009865:Oocytes / Q000502:physiology* / Q000648:ultrastructure; D017211:Treatment Failure