The spermicide kills most of the sperm that
enter the vagina.
The barrier method then blocks any remaining
sperm from passing through the
cervix to fertilize an egg.
Barrier methods include the diaphragm, cervical cap,
cervical shield, male condom, and female condom and spermicidal foam, sponges, and
film. Unlike other methods of birth control, barrier methods are used only when
you have sexual intercourse. Be sure to read the instructions before using a
barrier method. It is very important that you use a barrier method correctly
every time you have sex.
Birth control pills aren't for everyone. If you've forgotten your pills too
many times -- or can't take them -- there are plenty of options.
The birth control patch (Ortho Evra), vaginal ring (NuvaRing), and three
types of birth control implants (Mirena, Implanon, and Essure) offer long-term
birth control that is virtually hassle-free for months, years, or forever.
If pregnancy is still a future possibility for you, make your choice
carefully. With Ortho Evra, NuvaRing, and Mirena, fertility...
Follow the directions for your choice
of barrier method. After sexual intercourse:
A male or female condom is removed promptly and
A contraceptive sponge has to be left in for 6 or
more hours, then removed and thrown away.
A diaphragm or cervical
cap has to be left in for 6 or more hours, then washed and stored for
A cervical shield is left in for 8 or more hours, then washed
and stored for reuse.
Why It Is Done
Condoms are necessary when you need
to protect yourself or your partner from sexually transmitted disease (STD) or
when you do not know that you are both infection-free.
Latex or polyurethane male condoms give you and your partner the most effective
possible protection from STDs, including infection with HIV. Natural membrane
(sheepskin) condoms do not protect you against all STDs.
methods of birth control, such as a diaphragm, cervical cap, cervical shield, or
condom, are a good choice if:
You have heavy menstrual periods. A diaphragm may
be used for birth control during a menstrual period and can contain the
menstrual blood as long as it is not left in for longer than 6 hours at a
You and your partner find it easy to use the method every time
you have sex.
How Well It Works
Barrier methods of birth control
vary in how effective they are in preventing pregnancy.1, 2 They also vary in how effective
they are at preventing STDs.
*Failure rate equals the number of pregnancies that occur out of 100 women in the first year of use.
The cervical shield, such as Lea's Shield, is similar to the diaphragm and cervical cap. It is thought to be as effective as other female barrier methods
(the cervical cap, diaphragm, and sponge). But only limited studies have
been done so far. The cervical shield is made of silicone, so latex allergy is not a
problem. The device comes in one size only, simplifying the fitting process.
The shield currently requires a prescription.
A condom can tear when it is too tight or
fall off when it is too loose. If this should happen while you are having
emergency contraception. If you are worried about
exposure to a sexually transmitted disease (STD), get tested.
diaphragm or cervical cap in for longer than 24 hours increases your chances of
toxic shock syndrome.
Some people are allergic to
nonoxynol-9, which is the active ingredient in most spermicides. They can
develop sores in the vagina or on the penis, which make it more likely that HIV
can be transmitted from an infected partner during sex.
Food and Drug Administration (FDA) warns that nonoxynol-9 in vaginal
contraceptives and spermicides may irritate the lining of the vagina or rectum.
This also increases the risk of getting HIV/AIDS from an infected
What To Think About
If you have a possible risk of
giving or getting a sexually transmitted disease (STD) and you want to effectively prevent pregnancy, combine condoms
with a more reliable method of birth control, such as the hormone pills, ring,
patch, implant, or shot or an intrauterine device (IUD).
think that your barrier method has failed or has been used incorrectly, you can
emergency contraception to help prevent pregnancy.
Douching after intercourse does not prevent sperm from reaching the fallopian
tubes, where fertilization takes place. It may also increase your chance of
getting a pelvic infection.
Advantages of all barrier methods
of birth control:
Do not affect a woman's or man's future
Are only used at the time of sexual
Are safe for a woman to use while she is
Are less expensive than hormonal
methods of birth control, and some are available without a prescription.
Condoms and diaphragms may reduce the risk of cervical
cancer, which is caused by a sexually transmitted
human papillomavirus. Condoms also are the best method
for reducing the risk of sexually transmitted diseases, including HIV.
Disadvantages of all barrier methods
for barrier methods are higher than for most other methods of birth control. If
you are considering using a barrier method for birth control, think through
what the emotional and financial costs of an unintended pregnancy would be if
the method fails.
To prevent pregnancy with a barrier method, you
and your partner must be comfortable with using it and be prepared to use it
every time you have sex. For some couples, barrier methods are not a good
choice because one or both partners:
Find it embarrassing to use.
not want a barrier method to interrupt foreplay or intercourse.
Some people develop allergies to spermicides. But using
spermicide is advised with diaphragms, cervical caps, or cervical shields. So if
you can't use spermicide, you will need to find a different form of birth
For people who have an allergy to latex, polyurethane
condoms are available. Latex condoms are slightly more dependable than