Up to 15% of couples face infertility problems. In half of the cases the inability to have a child is associated with infertility men with insufficient speed of movement of sperm. Inactive sperm get to the egg and can't fertilize, writes The Daily Mail.
Specialists from the University hospital of Parma conducted a study involving 5188 men. It turned out the spermicidal activity was signicantly increased by the summer and decreases in winter. In the winter, say scientists, the probability of fertilization is much lower.
For successful conception requires not less than 40% motile sperm. Statistics say that in the summer these men, about 65%, and in winter about 50%. The speed of movement of sperm may be associated with the fluctuation of male hormones and other factors that depend on the time of year.