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Table 1 Comparison of vitrification outcomes for day 3 cleavage and blastocyst stage embryos using different carriers

From: The new Rapid-i carrier is an effective system for human embryo vitrification at both the blastocyst and cleavage stage

Stage at Vitrification

Cleavage

 

Blastocyst

 
 

Rapid-i

Cryoloop

Rapid-i

Cryoloop

Patient age

33.6 ± 3.3

34.1 ± 3.7

34.2 ± 3.8

34. ± 3.2

No vitrification-warming cycles

44

71

51

90

No. vitrified embryos warmed

92

139

92

163

No. intact embryos on warming (%)

91(99)

137 (99)

89 (97)

148 (91)

Mean no. embryos thawed

2.1 ± 0.7

2.0 ± 10.4

1.8 ± 0.7

1.8 ± 0.7

No. transfers

43

70

51

85

No. embryos surviving and transferred

85

130

88

143

Mean no. embryos transferred

2.0 ± 0.5

1.9 ± 0.4

1.7 ± 0.5

1.7 ± 0.5

Implantation rate (%)

31/85 (37)

46/130 (35)

43/88 (49)

54/143(38)

Clinical pregnancy rate (%)

20/43(47)

34/70 (49)

30/51 (59)

39/85 (46)

Multiple pregnancy rate (%)

2/20 (10)

10/34 (29)

8/30 (27)

9/39 (23)

Miscarriage rate (%)

2/43 (5)

3/70 (4)

5/51 (10)

6/85 (7)

Deliveries

15

29

16

26

Infants

16

36

18

36

Boys/Girls

8/8

17/19

9/9

15/21

Ongoing pregnancies

3

2

9

7

  1. No significant differences between carriers for vitrification at either cell stage.
  2. Data expressed as mean ± SD.