培養至囊胚期之胚胎之染色體仍有高達85%比例異常染色體(38% aneuploid, 38% diploid mosaic, 7% polyploid and 2% haploid)
囊胚期胚胎之染色體仍有相當高比例之異常染色體鑲嵌(mosaic)
儘管如此，異常染色體鑲嵌(mosaic)之囊胚期胚胎仍具自我修復能力‧
66%正常胚胎培養至囊胚期
<20%異常染色體胚胎培養至囊胚期
http://humrep.oxfordjournals.org/content/16/9/1954.full
