Table 2 Clinical outcomes of open and closed vitrification
Open vitrification | Closed vitrification | P value | |
|---|---|---|---|
(106 cycles) | (226 cycles) | ||
Cryosurvival rate | 147/150 (98.0) | 295/308 (95.8) | 0.224 |
Cancellation rate | 3/106 (2.8) | 8/226 (3.5) | 0.736 |
Clinical pregnancy rate/transfer | 49/103 (47.6) | 92/218 (42.2) | 0.365 |
Implantation rate/transferred blastocysts | 63/147 (42.9) | 105/295 (35.6) | 0.138 |
Pregnancy loss | |||
Miscarriage rate/pregnancy | 8/49 (16.3) | 21/92 (22.8) | 0.363 |
Ectopic rate/pregnancy | 0 | 1/92 (1.1) | 1.000 |
Live birth rate/transfer | 41/103 (39.8) | 70/218 (32.1) | 0.176 |
Complications during pregnancies | |||
Gestational diabetes | 1/103 (0.97) | 3/218 (1.3) | 0.760 |
Hypertension | 1/103 (0.97) | 2/218 (0.92) | 0.963 |
Placenta previa | 0 | 1/218 (0.4) | 1.000 |
Mode of delivery | |||
Spontaneous vaginal delivery | 5/41 (12.2) | 10/70 (14.3) | 0.756 |
Cesarean section | 36/41 (87.8) | 60/70 (85.7) | 0.756 |