Frequently Asked Questions


If my partner uses SpermaPause®, can I stop the pills or any other female contraceptive?
Male contraception with SpermaPause® is not immediate, it intervenes on average from week 6 of use of the device. During this time it is necessary to use another contraceptive while having sex with your partner. From week 6, it is recommended that the man performs a spermogram to make sure he has reached the contraceptive level. This is the only medical way to certify his contraception. Then you can give up on any other male or female contraceptive.

Caution: SpermaPause® does not protect against sexually transmitted infections / diseases against which use of condom is highly recommended.


How often should SpermaPause® be used?

The SpermaPause® device must be used on a daily basis, minimum two hours, throughout the desired contraceptive period. However if there is an occasional omission up to 3 consecutive days the current contraception will not be affected. The man simply needs to return to a regular use of SpermaPause® to pursue his contraception.

What is TMC?

The acronym TMC stands for Thermal Male Contraception, it is a contraception based on a natural physiological property of men, and common to all male mammals: spermatogenesis inside the scrotum relies on temperature. It goes on standby when the testicles reach the body temperature or above for extended periods of time. Then, there is no more sperm cells (spermatozoids) production. After a few weeks, the man will not have enough spermatozoids to be fertile. This mechanism is natural, safe and reversible.

How effective is TMC?

TMC is as effective as vasectomy, which is one of the best contraceptions with 99.9% effectiveness. Indeed, these two contraceptions have the same mode of action: the absence of spermatozoids. Without spermatozoids, no more fertilization is possible.

Can men still ejaculate?

Oh, yes! Sperm cells production (spermatozoids) and sperm production (semen) are two distinct processes. With TMC men continue to produce semen that will be ejected during orgasms. Simply, the semen will no longer contain enough gametes (spermatozoids) to be fertile. Unlike vasectomy where the vas deferens are incised and / or ligated, with TMC the entire male reproductive system remains intact and unharmed.

Is there an impact on the men's sexual performance?

TMC has absolutely no impact on men's sexual performance. The absence of spermatozoids has no effect on the libido. And although temporarily infertile, men keep their libido and their vigor. By analogy, pre-adolescent boys whose spermatogenesis is not yet active and are therefore infertile, yet they all have vigorous erections. Guys, do you remember? 

What is spermatogenesis?

Spermatogenesis refers to the process of producing spermatozoids, which are the reproductive gametes for men. It begins during puberty and takes place in the testicles. Producing a spermatozoid requires between 72 and 75 days (about 2 and a half months). Everyday, each man produces up to 100 million spermatozoids.

But what if there is one spermatozoid left, is it enough to get pregnant?

No. In normal conditions, men produce tens of millions of sperm cells everyday. It is the mass effect that makes a man fertile or not. In one ejaculation, the sperm contains between 100 million and 500 million sperm cells. Related to male fertility, the United Nations has established the following values:

- Above 20 million spermatozoids per milliliter of sperm, man can fertilize.
- Below 15 million spermatozoids per milliliter of sperm, the man is declared infertile. He will have severe difficulties to fertilize.
- Under 2.4 million spermatozoids per milliliter of sperm, the man is contracepted. He cannot fertilize.

With SpermaPause®, men will go below this contraceptive threshold, down to azoospermia, which is the total absence of spermatozoids, even when semen is observed under an electronic microscope.


Is TMC a recognized method?

TMC exists since the dawn of time, it was even quoted by Plato in the past! In modern era, several medical researchers have studied it and published very favorable articles about it. This is the case of the Swiss doctor Martha Vögeli who studied it for decades from 1930! In the early 1980s it was the French doctor Roger Mieusset who advocated the idea vigorously. The development of SpermaPause® results from the work of these doctors.

Why is TMC not more widespread?

During the twentieth century, trials of this method of contraception occured in India, Japan, and then in France. The advent of the female contraceptive pill in the 1960s, and then the all-condom health policy in the 1980s following the emergence of AIDS, did not help to develop further research on TMC. In addition, this method does not use medicinal or chemical substances; it seems to have been forgotten or abandoned by the pharmaceutical industry, which focused predominately on the development of new contraceptive for women.

Why 2 hours a day is enough with SpermaPause® while another method of TMC advocate up to 14 hours a day?

Spermatogenesis is a function of the temperature gradient: the warmer, the faster the contraceptive effect settles, which means a shorter thermal exposure duration for the same effect.

- In the 1930s, the Swiss doctor Martha Vögeli gave sitz baths at 48° C to her patients and 45 minutes a day was enough to ensure contraception. When the treatment was over, the men retrieved their fertility, and the pregnancies which followed were all normal, giving birth to healthy babies.
- In the 1980s, French doctor Roger Mieusset used body temperature (37.7° C) by putting the testicles inside the body and retaining them with elastics (a so-called "nut-lifter underpants"). The temperature gap is small with the scrotum (34.4° C) when spermatogenesis is active. The warmth exposure is then longer and must exceed 14 hours per day to put it on hold.
- Our SpermaPause® device has been developed to propose intermediate temperatures between both limit values, ​​in order to obtain a convenient range in terms of duration, between 2 and 4 hours per day. With SpermaPause®, you can adjust the warmth so you will always be in a comfortable and adequate temperature zone according to the seasons.


What is a spermogram?

A spermogram is an examination usually performed in an medical laboratory in order to analyze a man's semen. It will list many criterias such as the number of spermatozoids, their mobility as well as their morphology. This analysis allows to conclude on his fertility. The specialized laboratories offer excellent conditions for the collection of semen, which remains therefore a rather pleasant moment for men! 

What is the cost for a spermogram?

In France, the cost of a spermogram is approximately 30 to 35 euros. This medical act may be reimbursed by the national health service when it is prescribed by a doctor.

Can we find SpermaPause® in drugstores or specialized shops?

No. To date the product is only available online at www.jemaya-innovations.com.

Is this product reimbursed by the national health service?

No, but spermograms may be.

What fabric are the boxers made of?

The boxers are made of natural cotton (95%) and elastane (5%) to provide comfort and freedom of movement.