Summer Lovin’ is more than just a catchy song. Forget the sweetness of the Grease medley, apparently your summer days are the perfect months to try for a baby. It’s believed the seasonal change in hormone levels could be the trick to hearing the pitter patter of tiny feet. According to a new study, if you’re looking to conceive a baby, sperm is most active during the months of July and August. The research, published in the journal Chronobiology International, found that sperm motility is greatly increased during the summer months compared to the motility rate of the sample studied in the winter climates of December and January. Collecting data from more than 5,000 men at the Centre for Reproductive Incapacity of the University Hospital of Parma, in northern Italy, the results found that it was a case of quality and not quantity when trying to add to your family. Despite there being a higher volume of sperm in winter, the study found that the number of men with sperm motility greater than 40 per cent, was 65.3 per cent in summer, dropping to 50 per cent in winter. Speaking about the study, Dr Alfredo De Giorgi, wrote: 'We have shown the existence of a seasonal variation in some functional aspects of human semen.”