Table 4. Effect of embryo density on the number of cells in blastocysts in droplet or WOW cultures*.

Culture system	Embryos/dish	Total embryos examined	Number of cells/blastocyst a			ICM% (ICM/total)a
			Total	ICM	TE
Droplet	5	19	97.7 ± 53.6	32.5 ± 18.9	65.3 ± 37.2	34.0 ± 9.5
	15	25	91.3 ± 40.0	36.4 ± 15.3	54.8 ± 26.9	40.8 ± 8.2
	25	33	107.1 ± 37.0	39.4 ± 17.9	67.7 ± 29.2	37.5 ± 13.1
WOW	5	19	109.2 ± 33.2	36.4 ± 13.3	72.8 ± 27.4	33.8 ± 9.9
	15	30	122.1 ± 37.8	46.1 ± 18.3	75.9 ± 25.3	37.5 ± 7.7
	25	43	107.1 ± 38.2	37.2 ± 20.6	70.8 ± 25.7	33.1 ± 12.2

* Values were created with embryos from 5 replicate trials. ^a Values indicate the mean ± SD. ICM, inner cell mass; TE, trophectoderm.