Sunday, February 10, 2008
Sonicare Versus Rota-dent
is when a man pulls his penis completely from the woman's vagina before ejaculation, that is when you delete all the sperm together. Not a good contraceptive method, it is very difficult to prevent ejaculation outside the vagina to be effective. Coitus interruptus, is often ineffective because the fluid that escapes from the penis before ejaculation can contain sperm from a previous ejaculation.
If a woman uses the method of coitus interruptus, provided they have sex and do it correctly, is 96% effective. This means that if 100 women use the coitus interruptus all the time, and they always do it correctly, which is almost impossible, 4 women will become pregnant within a year.
anyway with regular use, the method has a safety index of 81%. This means that if 100 women use the withdrawal method, but not use it all the time and not always correctly, 19 women will become pregnant within a year. Coitus interruptus is not a method effective against STDs.
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