ICSI受孕2PN形成時間(16h)比IVF受孕2PN形成時間快1hr

smooth-surfaced endoplasmic reticulum (sER)不正常聚集於卵細胞質內，形成不正常之細胞質影像包括: incorporations, refractile bodies, dense central granulation, vacuoles, aggregation of sER，與卵細胞不正常，老化有關‧
ICSI受孕2PN形成時間(16h)比IVF受孕2PN形成時間快1hr

http://humrep.oxfordjournals.org/content/26/6/1270.full

Table II

BFS and ACE cleavage stage embryo grading system (after Cutting et al., 2008).

Criterion	Grade	Description
Blastomere number		Presented as nc (where n = cell no)
Blastomere size	4	Regular, even division
	3	<20% difference (cell diameter)
	2	20–50% difference
	1	>50% difference
Fragmentation	4	<10% fragmentation by volume
	3	10–20%
	2	20–50%
	1	>50%

Table III

Embryo assessment criteria as defined by SART.

Grade	Cleavage stage: cell number (1 → >8)		Morula/blastocyst: early/expanded/hatching
	Fragmentation (%)	Symmetry	Inner cell mass	Trophectoderm
Good	0 1–10%	Perfect	Good	Good
Fair	11–25%	Moderate asymmetry	Fair	Fair
Poor	>25%	Severe asymmetry	Poor	Poor
Unknown	Unknown	Unknown	Unknown	Unknown
Not entered	Not entered	Not entered	Not entered	Not entered