Table 2 Oocyte and blastocyst outcomes of PGT-A cycles with three COS protocols

Cycles (n)

152

126

179

No. of oocytes retrieved

7.16 ± 5.00 ^a

12.22 ± 6.25 ^b

12.04 ± 6.40 ^b

No. of MII

6.40 ± 4.48 ^a

10.96 ± 5.60 ^b

10.22 ± 5.57 ^b

MII rate (n/%)

973/1088 (89.43%) ^a

1381/1540 (89.67%) ^a

1830/2155 (84.92%) ^b

No. of fertilized oocytes (2PN)

4.63 ± 2.99 ^a

8.40 ± 4.68 ^b

7.88 ± 4.62 ^b

2PN Fertilization rate (%)

758/973 (77.90%) ^a

1125/1381 (81.46%) ^a

1482/1830 (80.98) ^a

No. of blastocysts formed

3.36 ± 2.14 ^a

6.71 ± 4.27 ^b

5.96 ± 3.74 ^b

No. of blastocyst biopsied

2.26 ± 1.48 ^a

3.79 ± 2.57 ^b

3.76 ± 4.47 ^b

No. of euploidy blastocyst

0.75 ± 0.92 ^a

1.79 ± 1.78 ^b

1.80 ± 1.67 ^b

Euploidy rate per biopsied blastocyst (n/%)

114/344 (33.14%) ^a

226/460 (49.13%) ^b

323/668 (48.35%) ^b

Euploidy rate per oocyte retrieved (n/%)

114/1088 (10.48%) ^a

226/1540 (14.68%) ^b

323/2155 (14.99%) ^b

Euploidy rate per injected MII oocytes (n/%)

114/973 (11.72%) ^a

226/1381 (16.36%) ^b

323/1830 (17.65%) ^b