Two couples in a hundred (2%) who use condoms perfectly, that is consistently and correctly,
will still have an average of one pregnancy per year, when condoms are their only means of
birth control. Considering that a female is not fertile most days of the month, that might give
an idea of how many exposures to sperm (in cum & precum) would be needed for a pregnancy.
If that fluid is STI infected, you can imagine the possible consequences. STI's, unlike pregnancy,
do not have to wait for a certain time of the month & SP's probably have way more sex than
couples do.
That suggests how important other means of safe sex are, such as STD testing.
"If you're sexually active, particularly with multiple partners, you've probably heard the following advice many times: Use protection and make sure you get tested. This is important because people can have a sexually transmitted disease (STD) without knowing it. In many cases, no signs or symptoms occur."
http://simple.wikipedia.org/wiki/Condom#In_preventing_pregnancy
This 2% has been accounted for by defects in the condom that lead to it slipping, breaking, or having small holes or tears large enough to leak sperm. Such holes and tears may easily not be noticed or be imperceptible to the naked eye.
The rates that condoms alone allow pregnancy are somewhat less than for coitus interruptus alone, i.e. BBFS without ejaculating inside the female.
"For couples that use coitus interruptus correctly at every act of intercourse, the failure rate is 4% per year. In comparison the pill has a perfect-use failure rate of 0.3%, and the I.U.D. has a perfect-use failure rate of 0.6%. The condom has a perfect-use failure rate of 2%.[8]"
http://www.mayoclinic.com/health/std-testing/ID00047
However...
"The presence of sperm in the fluid is debated. Existing research has found none or low levels of sperm in pre-ejaculate, though these existing studies are non-generalizable due to examining small numbers of men. [1][2][3][4] A contrary, yet non-generalizable study found mixed evidence, and individual cases of a high sperm concentration have been recently published.[5]
"...Popular belief--dating back to a 1966 Masters & Johnson study[11] --states that pre-ejaculate may contain sperm that can cause pregnancy, which is a common basis of argument against the use of coitus interruptus (withdrawal) as a contraceptive method. However, some studies have found that withdrawal could be almost as effective as condoms in preventing pregnancy.[12] There have been several small-scale studies (sample sizes ranging from 4 to 23[5]) that conclude no sperm is present, and thus, pre-ejaculate is ineffectual at causing pregnancy.[1][2][3][4]"
http://en.wikipedia.org/wiki/Pre-ejaculate
"The advantage of coitus interruptus is that it can be used by people who have objections to or do not have access to other forms of contraception. Some men prefer it so they can avoid possible adverse effects of hormonal contraceptives on their partners or so that they can have a full experience and really be able to "feel" their partner.[18] Some women also prefer this method over hormonal contraception to avoid adverse effects such as depression, mood swings, vaginal dryness, decreased libido, weight gain, and headaches, among others. It has no direct monetary cost, requires no artificial devices, has no physical side effects, can be practiced without a prescription or medical consultation, and provides no barriers to stimulation."
http://en.wikipedia.org/wiki/Coitus_interruptus
Studies found the so-called "perfect" use of condoms, that is correctly and consistently, leads to 1 pregnancy in every 50 couples in a year, i.e. a 2% pregnancy rate. I would assume that includes being properly "removed after the semen was discharged", but i haven't read the research.
"There are two ways to see how effective condoms are. They are method effectiveness, where how many couples that use the condom every time they have sex properly do not get pregnant are looked at; and actual effectiveness, where the number of people that use condoms either correctly or incorrectly and do not get pregnant are looked at. Most studies show results of effectiveness over a year.
"The method failure rate of condoms is 2% per year.[1] The actual failure rate is different in different places, and the rates can be anywhere between 10 and 18% per year.[2]"
http://simple.wikipedia.org/wiki/Condom#In_preventing_pregnancy
will still have an average of one pregnancy per year, when condoms are their only means of
birth control. Considering that a female is not fertile most days of the month, that might give
an idea of how many exposures to sperm (in cum & precum) would be needed for a pregnancy.
If that fluid is STI infected, you can imagine the possible consequences. STI's, unlike pregnancy,
do not have to wait for a certain time of the month & SP's probably have way more sex than
couples do.
That suggests how important other means of safe sex are, such as STD testing.
"If you're sexually active, particularly with multiple partners, you've probably heard the following advice many times: Use protection and make sure you get tested. This is important because people can have a sexually transmitted disease (STD) without knowing it. In many cases, no signs or symptoms occur."
http://simple.wikipedia.org/wiki/Condom#In_preventing_pregnancy
This 2% has been accounted for by defects in the condom that lead to it slipping, breaking, or having small holes or tears large enough to leak sperm. Such holes and tears may easily not be noticed or be imperceptible to the naked eye.
The rates that condoms alone allow pregnancy are somewhat less than for coitus interruptus alone, i.e. BBFS without ejaculating inside the female.
"For couples that use coitus interruptus correctly at every act of intercourse, the failure rate is 4% per year. In comparison the pill has a perfect-use failure rate of 0.3%, and the I.U.D. has a perfect-use failure rate of 0.6%. The condom has a perfect-use failure rate of 2%.[8]"
http://www.mayoclinic.com/health/std-testing/ID00047
However...
"The presence of sperm in the fluid is debated. Existing research has found none or low levels of sperm in pre-ejaculate, though these existing studies are non-generalizable due to examining small numbers of men. [1][2][3][4] A contrary, yet non-generalizable study found mixed evidence, and individual cases of a high sperm concentration have been recently published.[5]
"...Popular belief--dating back to a 1966 Masters & Johnson study[11] --states that pre-ejaculate may contain sperm that can cause pregnancy, which is a common basis of argument against the use of coitus interruptus (withdrawal) as a contraceptive method. However, some studies have found that withdrawal could be almost as effective as condoms in preventing pregnancy.[12] There have been several small-scale studies (sample sizes ranging from 4 to 23[5]) that conclude no sperm is present, and thus, pre-ejaculate is ineffectual at causing pregnancy.[1][2][3][4]"
http://en.wikipedia.org/wiki/Pre-ejaculate
"The advantage of coitus interruptus is that it can be used by people who have objections to or do not have access to other forms of contraception. Some men prefer it so they can avoid possible adverse effects of hormonal contraceptives on their partners or so that they can have a full experience and really be able to "feel" their partner.[18] Some women also prefer this method over hormonal contraception to avoid adverse effects such as depression, mood swings, vaginal dryness, decreased libido, weight gain, and headaches, among others. It has no direct monetary cost, requires no artificial devices, has no physical side effects, can be practiced without a prescription or medical consultation, and provides no barriers to stimulation."
http://en.wikipedia.org/wiki/Coitus_interruptus
Studies found the so-called "perfect" use of condoms, that is correctly and consistently, leads to 1 pregnancy in every 50 couples in a year, i.e. a 2% pregnancy rate. I would assume that includes being properly "removed after the semen was discharged", but i haven't read the research.
"There are two ways to see how effective condoms are. They are method effectiveness, where how many couples that use the condom every time they have sex properly do not get pregnant are looked at; and actual effectiveness, where the number of people that use condoms either correctly or incorrectly and do not get pregnant are looked at. Most studies show results of effectiveness over a year.
"The method failure rate of condoms is 2% per year.[1] The actual failure rate is different in different places, and the rates can be anywhere between 10 and 18% per year.[2]"
http://simple.wikipedia.org/wiki/Condom#In_preventing_pregnancy
