Name the device which controls the birth control ? And explain the name of devices how can do they work?
Answers
Devices
Barrier devices prevent the sperm from meeting the egg. They may be combined with spermicide, which kills the sperm.
Male condom
The male condom forms a barrier and prevents pregnancy by stopping sperm from entering the vagina. It is placed over the penis before sexual intercourse begins. A condom is made of polyurethane or latex.
It can also help to prevent the spread of sexually transmitted infections (STIs).
It is around 82 percent effective. Some 18 women in every 100 may conceive if their partner uses a condom.
Condoms are available from drugstores, supermarkets, and many other outlets. Health providers also supply them, sometimes for free. You can also purchase them online.
Female condom
The female condom, or femidom, is made of polyurethane. It has a flexible ring at each end. One fixes behind the pubic bone to hold the condom in place, while the other ring stays outside the vagina.
Spermicides may be placed in the vagina before intercourse. A spermicide kills sperm chemically. The product may be used alone or in combination with a physical barrier.
The female condom is 79 percent effective. Around 21 women will become pregnant each year with this method.
The femidom is less easy to find than the male condom. Only the FDA-approved FC2 is available in the United States. Health providers may supply them, or you can get them from a drugstore on prescription. You can also buy them online from Amazon or from the
Sponge
A contraceptive sponge is inserted into the vagina. It has a depression to hold it in place over the cervix. Foam is placed into the vagina using an applicator. The foam is a spermicide that destroys the male sperm, and the sponge acts as a barrier to stop the sperm from reaching the egg.
Between 12 and 24 women out of every 100 who use the sponge may become pregnant.
It is less likely to work if a woman has already had a baby.
The diaphragm
diaphragm
A diaphragm is a barrier method that is best used with spermicide.
A diaphragm is a rubber, dome-shaped device that is inserted into the vagina and placed over the cervix.
It fits into place behind the woman's pubic bone and has a firm but flexible ring that helps it press against the vaginal walls.
Used with spermicide, it is 88 percent effective. Used alone, it is between 77 and 83 percent effective.
Cervical cap
A cervical cap is a thimble-shaped, latex rubber barrier device that fits over the cervix and blocks sperm from entering the uterus. The cap should be about one-third filled with spermicide before inserting. It stays in place by suction.
It is around 88 percent effective if used with spermicide, and 77 to 83 percent effective without.
Injections
The contraceptive injection, or "the shot," is a progestin-only, long-acting, reversible, birth-control drug. The name of the drug is Depo-Provera, also known as the Depo shot or DMPA.
The shot is injected every 3 months at a doctor's office. It prevents pregnancy by stopping the woman from releasing an egg.
It is 94 percent effective, and the chance of pregnancy increases as the shot wears off. It is important to remember to book another shot after 3 months to ensure its effectiveness.
It does not protect against STIs.