Blastomere movement post first cell division correlates with embryonic compaction and subsequent blastocyst formation

Table 5 Embryonic and pregnancy outcomes after single vitrified-warmed blastocyst transfer, stratified by the value of dBMov/(t3-t2)

	No. of embryos	Female age	Male age	Blastocysts	Expanded blastocysts	No. of blastocysts transferred	Clinical pregnancy	Ongoing pregnancy	Follow-up data on live birth	Live birth
Group A [dBMov/(t3-t2) < 0.217]	208	39.1 ± 0.2	41.0 ± 0.4	170 (81.7)^a	165 (79.3)^a	121	58 (47.9)	48 (39.7)	72	27 (37.5)
Group B [0.217 ≤ dBMov/(t3-t2) < 0.300]	243	39.2 ± 0.2	41.2 ± 0.3	190 (78.2)^a	178 (73.3)^{a, b}	125	62 (49.6)	56 (44.8)	62	21 (33.9)
Group C [0.300 ≤ dBMov/(t3-t2) < 0.420]	232	38.9 ± 0.2	40.6 ± 0.3	178 (76.7)^a	160 (69.0)^{b, c}	118	51 (43.2)	42 (35.6)	55	19 (34.6)
Group C [0.420 ≤ dBMov/(t3-t2)]	283	39.1 ± 0.2	41.4 ± 0.4	193 (68.2)^b	178 (62.9)^c	132	63 (47.7)	55 (41.7)	57	21 (36.8)

Categorical data are presented as n (%), continuous data are presented as mean ± standard error of the mean. Abbreviations: dBMov/(t3-t2), duration of blastomere movement during the 2-cell stage. Different superscript letters indicate a significant difference at P < 0.05

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