Sperm DNA fragmentation index does not correlate with blastocyst aneuploidy or morphological grading

Itai Gat, Katelynn Tang, Kevin Quach, Valeriy Kuznyetsov, Ran Antes, Melissa Filice, Khaled Zohni, Clifford Librach, Itai Gat, Katelynn Tang, Kevin Quach, Valeriy Kuznyetsov, Ran Antes, Melissa Filice, Khaled Zohni, Clifford Librach

Abstract

High DNA fragmentation index (DFI) may be associated with poor outcome after IVF. Our aim was to determine whether DFI impacts blastocyst quality or clinical outcome. This retrospective study included 134 couples who underwent 177 IVF-ICSI and pre-implantation genetic screening (PGS) cycles during January 1st, 2014-March 31st, 2016 and had documented previous DFI. Group 1 (DFI>30%) encompassed 25 couples who underwent 36 cycles; Group 2 (DFI 15-30%) included 45 couples and 57 cycles; group 3 (DFI<15%) included 64 couples and 83 cycles. Male partners within group 1 were older (45.1 compared to 40.6 and 38.3 years, respectively, p<0.05), had higher BMI (32.4 compared to 26.6 and 25.8 respectively, p<0.05) and lower sperm count and motility (46*106/ml and 35.5%, respectively) compared to groups 2 (61.8*106/ml and 46.6%, respectively) and 3 (75.8*106/ml and 55.1%, respectively, p<0.05). Female parameters including ovarian reserve and response and embryo development were similar. Total numbers of biopsied blastocysts were 116, 175 and 259 in groups 1, 2 and 3, respectively. PGS for 24 chromosomes revealed comparable euploidy rate of 46-50.4%, with a similar morphological classification. No significant differences were found regarding pregnancy rates or pregnancy loss. It seems that DFI doesn't correlate with blastocyst aneuploidy or morphological grading.

Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Fig 1. Male demographic parameters and semen…
Fig 1. Male demographic parameters and semen analysis in multiple sperm DFI levels +.
+ Each parameter is described by specific units in the Y axis as followed: DFI—%; age: years; BMI: Weight in Kilograms / (Height in Meters x Height in Meters); volume—ml; Count: millions sperm cells per ml; motility—% of motile spermatozoa; morphology—normal morphology according to Kruger criteria [22]. *p<0.05.
Fig 2. Pre-transfer embryo development (absolute numbers).
Fig 2. Pre-transfer embryo development (absolute numbers).

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