Gather here, child-seeking couples or generally inquisitive members of the public.
According to the study published in the journal, Chronobiology International, seasonal changes in levels of hormones including testosterone may be responsible.
The study was based on 11 years of data, and more than 5,000 men being treated for fertility problems.
Doctors analysed data collected from 5,188 men attending the Centre for Reproductive Incapacity of the University Hospital of Parma, in northern Italy, looking for possible seasonal pattern in sperm quality.
At the end of the study, results showed that motility (the process where sperm wriggles and swims through a woman’s cervix, uterus and fallopian tubes in order to reach and fertilise a woman's egg) peaked in the summer (June - August) and was lowest in the winter (December - February).
It further showed that the number of men with a motility or movement greater than 40% (which is the minimum amount of sperm that should move for men to be fertile) was 65.3% in summer, and only 50%in winter.
Confirming the connection between seasonal changes and fertility, Dr. Alfredo De Giorgi, who led the study said “we have shown the existence of a seasonal variation in some functional aspects of human semen.”