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The main findings of studies we look at in more detail below are as follows: These degrees of protection may be lower than some readers expect, and rates of 98% reliability are still sometimes quoted for condoms.
However, because they are not always used correctly even if they are used consistently, studies have found efficacy rates of 85 to 87% when young women use condoms as their sole form of contraception.
Condoms are, however, the only method on that list that has been shown to protect against STIs as well as pregnancy.
Laboratory studies and product testing have shown that reputable condoms tested in the laboratory are completely impermeable to micro-organisms as small as viruses.
However, the same studies show that condoms come off the penis altogether 3 to 5% of the time but may slip down (but not off) up to 13% of the time.
These can be done in individuals whose characteristics are known and can be controlled for, and if the relationship truly is monogamous then infections by acute STIs and from outsiders can be ruled out.
One disadvantage is that condom use in long-term relationships, even in serodiscordant couples, is relatively rare.For these reasons, HIV transmission within long-term serodiscordant relationships, especially heterosexual ones, may be rarer than it is between casual sex partners.For all these reasons, large studies may be needed to establish differences in HIV (and HSV and HPV) incidence between condom users and non-users.The next problem is deciding what kind of study provides truly reliable evidence.It would be unethical to mount a randomised trial of condom use because the control group would have to stop using them altogether.Women were much less likely to report inconsistent use of condoms than never using them: over the course of the study, 46% of women said they used condoms ‘always’, 48% ’never’ and only 6% ’sometimes’.Tags: Adult Dating, affair dating, sex dating