It is argued that an extended DE period i. Men aged 18—22 years were included in this analysis. Functional evaluation of sperm in Colombian fertile men. To summarize, our results show that semen variables such as semen volume and total sperm count show a decrease when it is compared to the initial sample. United States Government Printing Office; There are several factors that may influence spermatogenesis including metabolic, genetic, environmental and physiological factors.
It has been proposed that recurrent ejaculations [ 22 ] could be an approach to improve sperm DNA quality and therefore reproductive outcome [ 1112 ].
Sperm Count Dropping in Western World
Covariate assessment A physical examination of each participant was performed on the same day as semen sampling in which weight and height were assessed to determine body mass index BMI and the presence of varicocele or other abnormalities was noted. The impact of sexual abstinence on conventional sperm parameters is still controversial [ 1112 ]. The variation is probably due to the rate of passage through the cauda which in turn can be influenced by ejaculatory frequency [ 34 ]. Spermatozoa are extremely susceptible to oxidative attack and this has been well-correlated with decreased sperm motility, lipid peroxidation, DNA damage and impaired fertilization rates [ 18 — 21 ]. Similarly, Sripada et al.