Scientists have discovered the best time to conceive is before 7.30am
It has been discovered in the study that sperm has its own 24-hour clock, with them being most active in the early hours of the morning.
The study has been conducted by the University of Zurich and also found that sperm was healthiest in the Spring months of March, April and May.
It looked at just over 7,000 men aged between 25 and 40 having fertility treatment.
Dr Brigitte Leeners, lead author, said: “Collection of semen in the early morning, where semen quality was highest, can be used to improve natural fertility as well as fertility resulting from assisted reproduction.”
But she warned that men who had less than 15 million sperm per millimetre – a low sperm count – no time of day or month would help them to conceive and they would need medical assistance to achieve that.
The study was published in science journal Chronobiology International.