Universidade Federal do Rio Grande do Sul Faculdade de Medicina Porto AlegreRS Brazil Faculdade de Medicina, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Generar Reprodução Humana Porto AlegreRS Brazil Generar Reprodução Humana, Porto Alegre, RS, Brazil.
Rev Bras Ginecol Obstet. 2024 Apr 9;46. doi: 10.61622/rbgo/2024rbgo36. eCollection 2024.
OBJECTIVE: Seminal cryopreservation causes significant damage to the sperm; therefore, different methods of cryopreservation have been studied. The aim of the study was to compare the effects of density gradient processing and washing/centrifugation with seminal plasma removal for cryopreservation in semen parameters. METHODS: Seminal samples of 26 normozoospermic patients were divided into 3 parts: with seminal plasma; after washing/centrifugation; and after selection through density gradient. The samples were cryopreserved for at least two weeks. Motility, sperm count, morphology and viability were evaluated before cryopreservation and after thawing. RESULTS: Density gradient processing selected motile and viable sperm with normal morphology in fresh samples (p<0.05). Cryopreservation negatively affected all sperm parameters regardless of the processing performed, and even if the sperm recovery was lower in the density gradient after the thawing, progressive motility, total motility, viability and morphology remained higher (p<0.05). CONCLUSION: Cryopreservation significantly compromises sperm parameters (motility, morphology, viability). In normozoospermic patients, the density gradients select better quality spermatozoa compared to other processing methods; this benefit was kept after thawing.
目的:精液冷冻保存会对精子造成严重损伤;因此,人们研究了不同的冷冻保存方法。本研究旨在比较密度梯度处理和去除精液中精子浆的洗涤/离心法对冷冻保存前后精液参数的影响。
方法:将 26 例正常精子症患者的精液样本分为 3 部分:含精子浆;洗涤/离心后;密度梯度选择后。将样本至少冷冻保存两周。在冷冻保存前和解冻后评估精子的活力、计数、形态和活力。
结果:新鲜样本中,密度梯度处理可选择具有正常形态的活动精子和存活精子(p<0.05)。无论采用何种处理方法,冷冻保存都会对所有精子参数产生负面影响,即使解冻后密度梯度中的精子回收率较低,前向运动精子、总活力、活力和形态仍保持较高水平(p<0.05)。
结论:冷冻保存会显著降低精子参数(活力、形态、活力)。在正常精子症患者中,与其他处理方法相比,密度梯度可以选择更好质量的精子;这种优势在解冻后仍保持。