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Background and Objective: There are different methods to improve sperm parmeters including swim up.Sperm washing is a basic step in This method during 2007. It seems that two times washing cause bether result especially in high viscosity sample and sample it is not liqufy. The aim of this study is to compare the single and double washing swim up method on sperm parameters.

Materials and Methods: This study was carried out on 50 semen samples referred to Fatemeh-Alzahra infertility center of Babol University of Medical Sciences during 2007. Semen samples had the following characteristics: volume 2-5ml, count>20 million/ml, motility>50% and normal morphology>14%. Sampling condition were completely considered. Sperm parameter analysis carried out after two times washing. Data entered to SPSS-10 and analyzed by repeated measurement and paired T-Test and p-value<0.05 considered statistically significant.

Results: Semen volume mean was 4.050±1.006. Mean sperm motility in one and two times washings increased (P<0.05), but there was not statistically significant differences between one and two times washing. In grading analysis, by increasing the washing, grade III, IV increase and grade I decrease (P<0.05). Sperm morphology mean increased with washing but it is not statistically different between one and two times washing.

Conclusion: This study showed that swim up method is effective method for sperm preparation and two times washing cause recuperation of sperm parameters.

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Background and Objective: Lichen planus presents with chronic, inflammatory mucocutaneous lesions with almost 1-2% prevalency without any relation to demographic variables. This study was done to describe the clinical pathologic features of lichen planus patients in Mashhad, Iran. Materials and Methods: In this descriptive study, demographic data (age and sex) and some factors such as histology, form and anatomical zone of lesions were recruited from patient’s medical records and pathological slides revised. Data analyzed by using SPSS-13 software and chi-square and T student tests. Results: 309 patients (177 male, 132 female) were enrolled. Mean age was 40.12±16.3 years-old and patients were categorized mostly in 41-50 years age group. Clinical presentation in 44% was plaque and 41.7% with papules, 23.9% hyper pigmented, 26.9% scaled, 4.9% annular form and 2.9% linear. 45.6% of patients had classic histo-morphology and 25.9% of them had hypertrophic form. There was not any relationship between lesion histopathology with either sex or age. Anatomical zone had a significant relation with histopathology of lesion (P<0.05). Conclusion: This study showed that the prevalence of genital and mucousal lesions was lower than reported in other studies in various parts of the world.