This is the best time of day to have sex if you are trying to fall pregnant

Scientists have revealed that the ideal time to fall pregnant is 7.30am, which is when sperm is at its most potent.

New research by experts from University Hospital Zurich, Switzerland, suggested semen has its own 24-hour internal clock and the highest levels of sperm concentration are found early in the morning.

The study also found that sperm had the most ‘normal morphology’ – being the perfect size and shape to fertilise an egg – during the summer months.

Lead author Dr Brigitte Leeners, of the university’s Department of Reproductive Endocrinology, said: “Male semen quality varies with both circadian and circannual rhythms.

“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.”

She and her team analysed 12,245 semen samples from 7,068 men, aged between 25 and 40 and undergoing fertility treatment with their partner, collected at the university between 1994 and 2015.

The samples were retrospectively cross-checked for a number of factors, including sperm concentration, total sperm count and progressive motility.

The results suggest semen quality differs between the hours of the day and months of the year.

Dr Leeners, writing in the journal ‘Chronobiology International’, said semen collected in the spring months of March, April and May had the greatest sperm concentration and concentration.

She explained: “The semen samples collected in the early morning before 7:30 a.m. showed the highest levels in sperm concentration, total sperm count and normal morphology, all with statistical significance.

"Furthermore, a significant increase in sperm concentration and total sperm count was found in spring, with significant decreases in the summer.

“The highest percentage of normal morphology was found in summer.”

Leading assisted reproduction specialist Dr Hana Visnova was positive about the study but said its findings should be treated with caution.

Dr Visnova explained: “Sperm collection is clearly a vital aspect of any IVF procedure, so if we can maximise the potency of a sample then that’s to be encouraged.

“Yet the evidence relating to the best times of the day, or the year, for that to take place is conflicting and controversial.

“Other studies have shown that the afternoon, between 5.00 and 5.30pm, is when sperm is at its most potent.

“While other research has failed to offer any concrete conclusions at all.

In times of increasing numbers of couples struggling with infertility, and thus increasing demand for successful assisted reproduction, the aim of our study was to evaluate circadian and circannual rhythms and their association with semen quality.

“What’s important to make clear is that if you have a low sperm count – classed as fewer than 15 million sperm per millilitre of semen – then no matter the time of day or the month of the year, you may need medical help to achieve your dreams of having a child.”

It’s not the first time sex at 7.30am has been championed.

In August last year a separate survey by a food supplement company found that having sex at 7.30am – and roughly 45 minutes after waking – was the optimum time when it comes to lowering blood pressure and stress levels, and leaving you feeling relaxed for the rest of the day.

Meanwhile, these four mums had help falling pregnant using apps on their PHONES.


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