Please use this identifier to cite or link to this item:
|Title:||Comparative evaluation of fresh and washed human sperm cryopreserved in vapor and liquid phases of liquid nitrogen||Authors:||Saritha, K.R.
|Issue Date:||2001||Citation:||Saritha, K.R., Bongso, A. (2001). Comparative evaluation of fresh and washed human sperm cryopreserved in vapor and liquid phases of liquid nitrogen. Journal of Andrology 22 (5) : 857-862. ScholarBank@NUS Repository.||Abstract:||Infectious organisms such as hepatitis B were recently shown to survive in liquid nitrogen. To prevent cross-contamination of semen samples via liquid nitrogen, studies were undertaken to evaluate human sperm survival in the vapor phase of liquid nitrogen at -189°C. The study was conducted in 2 separate experiments. In the first experiment, a total of 30 unwashed, fresh semen samples (15 normozoospermic and 15 oligozoospermic) were evaluated for motility, vitality, and morphology after freeze-thaw survival in vaporous (-189°C) and liquid nitrogen (-196°C; control) phases. Similar evaluations were carried out in a second experiment on 27 samples (15 normozoospermic and 12 oligozoospermic) that were previously washed by the swim-up method. Motile sperm recovery rates were significantly different between liquid and vapor phases (unwashed, normozoospermic: 42.76% ± 3.23% vs 45.52% ± 4.44%, P < .05; washed, normozoospermic: 34.44% ± 4.41% vs 37.58% ± 3.90%, P < .05; unwashed, oligozoospermic: 16.53% ± 3.34% vs 18.25% ± 4.36%, P < .05; washed, oligozoospermic: 10.32% ± 2.54% vs 12.25% ± 2.81%, P < .05). Recovery rates for motility were much higher for unwashed samples compared with washed semen samples. In all experiments the recovery of normal and live forms showed no significant differences between the vapor and liquid nitrogen storage phases (P > .05). The results demonstrate that both washed and unwashed human sperm survive satisfactorily with good recovery in the vapor of liquid nitrogen and can be recommended for future storage in medically assisted conception programs.||Source Title:||Journal of Andrology||URI:||http://scholarbank.nus.edu.sg/handle/10635/129562||ISSN:||01963635|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 24, 2021
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.