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