@entity8291 ( @entity8291 ) in mammals is a determining factor in the deterioration of spermatogenesis and can cause @entity249 . The aim of this study was to evaluate the effect of continuous summer circadian cycles on semen production, sperm cell features, fertility, prolificacy, and fecal @entity701 metabolites from @entity95 kept under an in  vivo @entity8291 model. We split randomly 60 New Zealand White @entity95 into two temperature-controlled rooms: The control group was maintained at comfort temperature (18    C-22    C) and an @entity8291 group, where the environmental temperature was programmed to increase from 22    C to 31    C and be maintained for 3  hours to this temperature at the central part of the day. Fecal @entity701 metabolites were assessed to evaluate the stress conditions. Seminal parameters were analyzed. Although animals exposed to @entity8291 showed higher values of fecal @entity701 metabolites (P  =  0.0003), no differences were detected in fertility or prolificacy. Semen samples from @entity8291 males showed a significant decrease (P  <  0.05) with respect to the controls in the percentage of viable spermatozoa (80.71% vs. 74.21%), and a significant (P   <=  0.01) increase in the percentage of @entity854 (22.57% vs. 36.96%) and tailless spermatozoa (7.91% vs. 12.83). Among motility parameters, no differences were found. This study describes a model of @entity8291 simulating a continuous summer daily cycle that allows periods of time to recover as it occurs under natural conditions. Although negative effects have been detected in several sperm parameters, fertility and prolificacy were not affected, suggesting a recovery of the reproductive function when normal conditions are reestablished.

Daily exposure to summer circadian cycles affects spermatogenesis, but not fertility in an in  vivo XXXX model.

@entity249 :: ('MESH:D007246', 'Disease') :: ['infertility'] @entity95 :: ('9986', 'Species') :: ['rabbits'] @entity854 :: ('MESH:D018376', 'Disease') :: ['acrosomic abnormalities'] @entity8291 :: ('MESH:D018882', 'Disease') :: ['Heat stress', 'HS'] @entity701 :: ('MESH:D006854', 'Chemical') :: ['cortisol']
@entity95 :: (9986,Species) :: ['rabbit']
