Table 5 The effect of transferred blastocyst grade on the rates of clinical pregnancy and live birth

Good

Number of transfer cycles

143

379

598

—

Number of clinical pregnancy

97 (67.8)^a

254 (67.0)

421 (70.4)

0.507

Number of live birth (per transfer cycle)

82 (57.3)

218 (57.5)

359 (60.0)

0.688

Fair

Number of transfer cycles

487

629

746

—

Number of clinical pregnancy

270 (55.4)^b

381 (60.6)^b

509 (68.2)^c

<0.001

Number of live birth (per transfer cycle)

216 (44.4)^b

314 (49.9)^b,c

409 (54.8)^c

0.001

Poor

Number of transfer cycles

309

216

254

—

Number of clinical pregnancy

123 (39.8)^b

116 (53.7)^c

138 (54.3)^c

0.001

Number of live birth (per transfer cycle)

103 (33.3)^b

77 (35.6)^b,c

110 (43.3)^c

0.045