| Method of in vitrofertilization | |||
---|---|---|---|---|
 | IMSI group | ICSI group | ||
 | previous ICSI | current IMSI | previous ICSI | current ICSI |
 | Blastocyst transfers | |||
No. of transfers | 0 | 10 | 0 | 13 |
No. of transferred embryos | 0 | 18 | 0 | 24 |
Average no. of transferred embryos per transfer | 0 | 1.8 ± 0.29 | 0 | 1.8 ± 0.70 |
No. of pregnancies | 0 | 3 | 0 | 3 |
Pregnancy rate per transfer | 0% | 30% | 0% | 23.0% |
Spontaneous abortions | 0 | 0 | 0 | 2 |
 | Morula transfers | |||
No. of transfers | 21 | 10 | 35 | 14 |
No. of transferred embryos | 26 | 17 | 41 | 20 |
Average no. of transferred embryos per transfer | 1.2 ± 0.82 | 1.7 ± 0.34 | 1.2 ± 0.75 | 1.4 ± 0.7 |
No. of pregnancies | 0 | 2 | 0 | 0 |
Pregnancy rate per transfer | 0% | 20% | 0% | 0% |
Spontaneous abortions | 0 | 1 | 0 | 0 |
 | Cycles with no embryo transfer due to developmental arrest | |||
No. of cycles | 12 (36.0%) | 0 (0%) a | 11(24.0%) | 10 (27.0%) b |