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Introduction: The purpose of this study was to evaluting of salivary estriollevel in hospitalized women with diagnosis of preterm labor.
Materials and Methods: This was an analytic observationat investigation. During this study, salivary estriol specimens were obtained from 43 women at 24 to 34 weeks 6 days gestational age with symptoms of preterm lab or .We compared maternal salivary estriollevels between case group with preterm labor.
Results: This study showed that the mean of salivary estriollevels in 31, 32, 33, 34 weeks in case group were higher than control group. Reciever-operator curve showed that exceeding a 0.1875 ng/ml salivary estriollevel was associated with occurrence of preterm delivery.
Conclusion: This study showed a wide range of salivary estriollevels in different pregnants and this distinction became more extent with lengthening gestation. Detection of increased estriollevel may be clinically helpful in defining at risk woman for preterm birth.

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Introduction:Final examinations are important stressors in schools and universities that result in different psychoneuroimmunological outcomes but the study of these effects on children has not been paid enough attention to. The aim of this study is to investigate the effect of final examinations on salivary immunoglubulin A in children. Materials and Methods: In this clinical trial a total of 100 children (50 boys, 50 girls) in 5th grade, aged less than 12 years from two primary schools of 5th educational district in Tehran were choosen randomly. The subjects completed Test Anxiety Scales of Sarason & Abolghasemi. After making sure of their physical and mental health by reviewing their medical history, clinical examinations and after controlling sleep, food, drug and sport variables, based on time series design, salivary IgA samples were taken five times as followed: one week before and then three times through mathematics, history and science exams and at last one week after passing the exams at, 9 to 10 am. IgA samples were analyzed by nephlometry method. Data was analyzed using ANOVA. Results: Findings indicated that IgA level was decreased significantly during examinations comparing to IgA levels before and after examinations (p=0.01). The relations of sex and anxiety scores were not statistically significant. It means that decreased IgA levels are the same in all children. Conclusion: Final examinations as a stress resource, diminishes IgA and this change is not related to sex and test anxiety score.

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Background: The hypothesis that non-secretor status of individuals makes them more susceptible to certain bacterial infections and they might be at a greater risk of metabolic syndromes and autoimmune diseases motivated us to evaluate the relationship between secretor status and risk factors for duodenal ulcer in the present study.

Materials and Methods: This case-control study was done on 120 patients with duodenal ulcer, gastric ulcer, and gastric cancer undergoing endoscopy, and a control group including 120 healthy individuals. Secretor status was determined by saliva and the association of some risk factors with the prevalence of disease was determined by a questionnaire. The results were analyzed by SPSS software version 16.

Results: Overall, 27.5% of the patients were non-secretor and 72.5% were secretor, whereas 20.8 % of the controls were non-secretor and 79.2% were secretor. There was not a significant relationship between secretor status and the incidence of gastrointestinal diseases. However, some risk factors, such as gender, smoking, and physical activity, were significantly associated with gastric disease.

Conclusion: The statistical analysis showed that there was not a significant association between secretor status and prevalence of gastric disease. According to the results, gastrointestinal diseases are more common in men than women and in smokers more than nonsmokers. Furthermore, physical activities reduce the incidence of this disease.

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