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- W4313013294 abstract "Nowadays, sperm cryopreservation is strongly recommended in cases of malignancy. Moreover, the use of frozen testicular sperm in azoospermic patients prevents the need for repeated sperm retrieval and optimises scheduling between oocyte and sperm obtainment. Even though cryopreservation of human spermatozoa for assisted reproductive purposes is a widely implemented practice, none of the established freezing and vitrification techniques offer optimal cryosurvival results due to the dramatic impact of cryodamage on sperm cells. This comprehensive review describes the most commonly used sperm cryopreservation techniques in order to establish which of them minimise sperm cryodamage and offer better survival rates. Presently, it is not sufficiently demonstrated that sperm vitrification improves survival significantly more than freezing methods. Slow freezing offers the best survival results when compared to other freezing protocols, and owing to its technical advantages, can be considered as one of the preferred protocols to be easily implemented in assisted reproduction laboratories. Moreover, several studies have suggested that sperm preparation prior to cryopreservation can improve thawed sample quality. However, other authors have demonstrated that freezing the fresh sample and performing semen preparation after thawing gives better results in regard to total motile sperm count and motility. Regarding clinical results, it is well established that similar or even better reproductive outcomes are achieved using frozen testicular sperm in cases of azoospermia or anejaculation. Moreover, the use of frozen semen in cancer patients can help to achieve good fertilisation and pregnancy rates. Finally, the use of frozen sperm is not at all associated with worse post-natal development." @default.
- W4313013294 created "2023-01-05" @default.
- W4313013294 creator A5019993626 @default.
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- W4313013294 date "2019-08-08" @default.
- W4313013294 modified "2023-09-27" @default.
- W4313013294 title "Description and Outcomes of Current Clinical Techniques for Sperm Cryopreservation" @default.
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- W4313013294 doi "https://doi.org/10.33590/emjreprohealth/10310343" @default.
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