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Table 1 Studies on the relationship between the presence of large sperm vacuoles and chromatin condensation, DNA fragmentation and aneuploidy

From: Intracytoplasmic morphologically selected sperm injection (IMSI): a critical and evidence-based review

References

Patients

Sperm cells

Vacuoles

Altered/abnormal chromatin packaging

DNA fragmentation

Aneuploidy

Boitrelle et al., [23]

15

450

≥ 25% head area

+

=

=

Perdrix et al., [22]

20

 

>13% head area

+

Higher in native spermatozoa

+

Garolla et al., [26]

20

200

LNV

+

NA

+

Franco et al., [27]

66

1351

≥ 50% head area

+

NA

NA

Cassuto et al., [28]

26

10400

score 0a

+

=

NA

Wilding et al., [14]

8

860

≥ 4% head area

NA

+

NA

Oliveira et al., [18]

538

200/patient

5- > 50% head area

NA

+

NA

Franco et al., [29]

30

382

≥ 50% head area

NA

+

NA

Hammoud et al., [30]

8

1775

>4% head area

NA

+

NA

Watanabe et al., [19]

20

227

>1.5 μm

NA

=

NA

  

33

>1.5 μm

NA

NA

=

  1. LNV, large nuclear vacuole; NA, not assessed.
  2. ascore 0, according to the Cassuto-Barak classification, showing an abnormal head with a large diameter vacuole and an abnormal base. For DNA fragmentation and aneuploidy: =, equal between vacuolated and non-vacuolated spermatozoa ; +, increased in vacuolated spermatozoa.