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Table 2 Effect of blastocyst score on pregnancy outcome

From: Developmental stage on day-5 and fragmentation rate on day-3 can influence the implantation potential of top-quality blastocysts in IVF cycles with single embryo transfer

Different categories of advanced blastocysts

Not implanted % (n)

Implanted % (n)

P value

Total BL3 (n = 81) (BL3AA, BL3AB, BL3BA, BL3BB)

70.3% (57)

29.3%(24)

 

Total BL4 (n = 122) (BL4AA, BL4AB, BL4BA, BL4BB)

43.4% (53)

56.5%(69)

p < 0.05

Top quality BL3 (n = 76) (BL3AA, BL3AB)

65.4% (53)

28.3%(23)

 

Top quality BL4 (n = 109) (BL4AA, BL4AB)

36.8% (45)

52.4%(64)

p < 0.05

Individual implantation rate of advanced blastocysts

   

   • BL3AA (n = 62)

67.7% (42)

32.3% (20)

 

   • BL3AB (n = 14)

78.6% (11)

21.4% (3)

 

   • BL3BA (n = 2)

50% (1)

50% (1)

 

   • BL3BB (n = 3)

100% (3)

0

P = 0.02

   • BL4AA (n = 107)

43% (46)

57% (61)

 

   • BL4AB (n = 4)

25% (1)

75% (3)

 

   • BL4BA (n = 6)

33.3% (2)

66.7% (4)

 

   • BL4BB (n = 5)

80% (4)

20% (1)