Negative Effects Of Hot Tubs


A close friend of mine who was thinking of getting a hot tub recently asked me about any negative effects of hot tubs I knew of as she was aware we’d had our hot tub for a few years.

She and her husband are in their early twenties and are no doubt looking forward to the patter of tiny feet as she was asking about hot tubs and conception – is the rumor right about how hot water ruins a man’s chances of becoming a father was the first thing she asked.


On top of this, she wanted to know the safe hot tub temperature for male fertility and, for her side of it, what was the safe hot tub temperature for pregnancy and whether she should avoid hot tubs altogether.

I recalled there was some mixed information I found when we were searching before we got our hot tub, so I sat her down and told her what I knew.

I started off with how men have their most precious dangly bits out in the open air to keep them slightly cooler than body temperature, as that, apparently is the best temperature to keep sperm in prime condition for reproduction, or so we’re told.

But I have my doubts about that.


Let’s take examples of reproduction around the world. Ask yourself where populations are expanding the most – if you don’t count race or government controls (like they had in China) in the survey.

Colder countries are a bit of a non-starter, while hot countries come out on top of the list; but is that down to lack of birth control through naivety, ignorance, religious or financial concerns, or maybe it could be something like a lack of power supplies and owning televisions?


And what is the temperature like in hot countries?

Many a time it gets over 100F every day in equatorial regions. Sometimes over 110F (hotter than a hot tub) – and still they keep bashing them out faster than the milder countries.


So what does that tell you?

Anyway, that’s my thinking as far as men are concerned. For a woman that’s a different matter altogether.

Being pregnant in hot countries, where a body overheats, can cause birth defects, stillbirths, poor mental development and a myriad of other health problems where a child does not get past the age of one too often, so you can see excess temperatures affect the sexes in different ways.


Fine… The female has no problems until she has conceived. From then on, for the benefit of the baby, she must keep her temperature within a couple of degrees of natural body temperature – definitely no more than 101F.


Males, on the other hand, need to be not more than 102F otherwise they lose their potency big time and once it has dropped off and hit the floor  –  that’s it – gone!

They can keep whistling for it like a pet dog until their lips are sore, but there’s no way it’ll return home.

I could just imagine this scenario.

They are both lying there, soaking naked in the hot water, dozing off, and there’s a small wood scaffold leaning out over the hot tub.

Tied to the end is a piece of taut string falling almost to the water, with a well-polished three-prong candy grabber on the other end that’s holding something up above the water’s surface.

Over to one side is an air conditioning unit blowing cold air across the top of the water.

Can you guess what the grabber is holding up?


Our docs tell us the safe hot tub temperature for male fertility is around 102F and any hotter than that means having shorter soaks.

A limit of no more than ten minutes per session is suggested at 104F and that means skipping alternate days to allow sperm to recover, preferably longer to get the best results.


Makes you wonder if it’s worth having a hot tub, doesn’t it?

So it’s ok buying a hot tub if kid production isn’t an issue.

But that’s only for the male side of things. If it is an issue for the ladies, then remember it is best to keep away from hot tubs once your seed is fertilized and the crop begins to swell.


Hot Tub During Ovulation

From a female perspective, there are many rumors going about regarding hot tubs and conception.

She needed to know whether or not hot tubs prevent pregnancy; and what about using a hot tub during ovulation? And if she got lucky, was there a safe hot tub temperature for pregnancy?


She had me scratching my head for a while. She must have thought I was the local hot tub owning obstetrician, gynecologist or something.


So, starting at the beginning from a woman’s point of view take a look at this video as it virtually backs up everything I am writing on here:


Regarding hot tubs and fertility, females do not have much of a change other than being more relaxed and receptive after being in a spa. Tensions tend to evaporate, so that means you are far more likely to conceive in a stress-free state than you would otherwise, providing you are not too hot.


Hot Tubs And Conception

As a general rule of thumb for us girls, hot tubs are fine for you providing you don’t stay in there for more than ten minutes each session if the water is at 104F, that way not raising your core temperature too much.

You could use it twice a day at that temperature, but you would need to cool down to normal for a few hours at least, to let your body recover from being cooked ever so slowly.

Short bursts are also better regarding de-hydration where you sweat without realizing it in a hot tub, so you will need to drink plenty to keep your hydration levels up.

The thing you must do is restrict hubby from soaking as this will diminish his potential to become a father rapidly and could take up to three months before he’s back to normal and that’s if he ever recovers.

The simple alternative is to have the temperature set lower, just 3 or 4 degrees above body heat at around 102F, as that way you sweat less and can stay in the hot tub for longer periods and the best of it is hubby will be fine at that as well, proving he doesn’t fall asleep in there.

Can u use a hot tub when pregnant

Here’s where it gets a bit naughty for us girls.

Is it safe to use a hot tub while pregnant in the first trimester?

Relaxing in a hot tub is wonderful for your aches and pains but even though you may not be aware you are pregnant in the first five or six weeks, in this time period this can do a heck of a lot of damage to your newly forming baby.

So, how does hot tub use affect your baby?

Tests have shown that the nervous system and spine are two of many parts of a baby’s very early development which excessive heat can be detrimental too.

This is the sort of thing that produces faults in the neural system developing into problems like spina bifida.

These neural tube defects average about 1 in 1,000 normally but increase to 2 in 1,000 with the use of hot tubs in early pregnancy where the mother has used the hot tub either too hot or for prolonged periods whilst unaware of the pregnancy.

It is reckoned that having the water temperature at 101F or less is OK, but anything higher is obviously increasing the risk to these diseases.

With around half the pregnancies in the world being unplanned this means if you have access in the first six weeks of early pregnancy to hot water in baths, spa’s, steam rooms, saunas and hot tubs then you have the chance of your baby developing this condition, even though you have not even been aware of being pregnant.

Beyond this time there is much less chance of development issues for your baby.

If you truthfully want to avoid this risk altogether then avoid the hot tub during the first trimester of pregnancy altogether to give yourself a buffer. A nice, warm soak in your bath is a very safe alternative if you want to relax in the water.

Safe Hot Tub temperature For Pregnancy

If you still want to enjoy the hot tub, soak for short periods of time, making sure the water temperature is below 101 degrees and if your hot tub has water jets, keep away from those as they are heated water.

Once beyond the first trimester truly this sort of risk is virtually gone.


Again, hot tubs, being hotter than your body temperature, do not allow your core body temperature to regulate itself by evaporating sweat.

Internally you get hotter the longer you stay in the water – meaning your temperature rises, as does your baby’s.

This is extremely detrimental to your unborn child and the same applies to using a hot tub while pregnant in the third trimester despite the fact your baby is now more naturally developed.

If you must partake, then keep the temperature down or possibly just dangle your feet in the hot(tish) water for a while.

On top of these pregnancy issues, more can be found regarding bacterial problems relating to lack of cleanliness within these pages

As a final note regarding using hot tubs while pregnant, just think before you jump in.

In days of yore, when my Granny was alive, girls who wanted to get rid of a pregnancy, as then it was considered shameful out of wedlock, were recommended to have hot baths and drink at least half a bottle of gin.

In this way the fetus would very likely be miscarried owing to the heat and the mother would be so sozzled she was unaware of it happening. Plus, on top of that, alcohol itself is supposed to be bad for a developing baby and continued pregnancy.

Why not check out our other helpful posts?

How to raise pH in hot tub

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