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If you start on the 1st day of your period. Then 7 days! If you are starting randomly on a Sunday most likely , then 28 days.

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Q: How long before Tri Sprintec birth control prevents pregnancy?
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How do birth control pills prevent prevent pregnancy?

They either inhibit the release of an egg, or prevents the egg from implanting - therefore the womb purges the lining before the egg can gain nourishment.


Why do you get a pregnancy test before receiving birth control?

Birth control works by preventing pregnancy. If you are already pregnant, birth control is of no use.


How do oral contraceptives-specifically with birth control pills-prevent pregnancy?

They either inhibit the release of an egg, or prevents the egg from implanting - therefore the womb purges the lining before the egg can gain nourishment.


I just started birth control Do you have to take birth control for a full month before it prevents pregnancy?

usually if you take the birth control for a week straight without missing any you will be protected. even if you use birth control it isn't 100% effective, so you should use condoms to be safe.


You took birth control pills before taking a pregnancy test will that affect it?

Birth control pills have no effect on pregnancy tests.


Can you take a pregnancy test a week before your first white pills?

Yes. Birth control pills do not affect the accuracy of pregnancy tests.


What is the oute?

Some people believe that if you "pull out" the penis before ejaculation, you can avoid pregnancy. This is not an effective means of birth-control since semen can be released before ejaculation and cause pregnancy.


Do you have to get tested before getting birth control at a clinic?

Yes you could be pregnant so perform a pregnancy test BEFORE taking birth control.


Can a girl get pregnant if you but in her then she takes birth control right after?

Birth control is NOT instant and needs to be taken 30 days before it is protecting against pregnancy. I suggest before you have any further sex you take sex education, learn about prevention of pregnancy, and to realize that sex has responsibilities.


Remedies to prevent pregnancy?

To prevent pregnancy, stop it before you get pregnant, there are many methods. The birth control pill, condoms etc. Talk to your gynecologist what will suit you the best. If you have had unprotected sex you can also take the Morning after pill up to 72 hours afterwards. That prevents the egg to attach to the uterus wall. Once you are pregnant only abortion will work.


Can you get pregnant a week before your period on birth control?

If you take the BCP everyday as directed you are 99.5% protected from pregnancy.


When does birth control pill set in?

Birth control must be taken every day for 4 weeks before it will protect you against pregnancy. To continue with the protectiveness of birth control you must continue taking a pill every day. Missing a pill will put you at a increased risk of pregnancy.