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Table 2 Clinical outcome of IMSI and ICSI procedures according to the developmental stage of the transferred embryos in comparison with previous ICSI cycles

From: The IMSI procedure improves poor embryo development in the same infertile couples with poor semen quality: A comparative prospective randomized study

 

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

  1. Values are average ± SD
  2. a vs. b statistically significant difference as evaluated by the chi-square test (p < 0.05)