The pill contains hormones and chemicals which trick your body into thinking its pregnant in the sense that it prevents your body from ovulating and releasing a egg awaiting fertilization. If you miss a pill this decreases the amount of hormones preventing pregnancy and puts you at risk of pregnancy. Birth Control will not prevent pregnancy until you've been taking it for 4 weeks.
The abortion pill works up to the 9th week. No other pill works. If you mean the birth control pill or morning after pill, it will not work as soon as you are pregnant.
Alesse works as any other combination birth control pill. A combination of progestin and estrogen prevents ovulation when nthe pill is taken daily.
Cortisone does not affect how well the birth control pill works.
Augmentin does not affect how well the birth control pill works.
The Alli pill works in mysterious ways. It is a fat blocking pill that helps people to lose weight by not doing anything.
It works just as well.
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The morning after pill disrupts the LH surge. That's part of how it works. The morning after pill does not contain LH.
Oral sex does not affect the birth control pill. It still works just as well.
Chlamydia doesn't change how well the birth control pill works. Since you're abstaining until treatment is complete, it's a moot point.
After beginning Yasmin, the pill can regulate your periods. Yasmin is normally a birth control pill that is used to prevent pregnancy.
If you had missed a pill or been late with a pill, causing you to take the morning after pill, then you should use a back up method of birth control for the next seven days. If you didn't forget a pill or take a pill late, then I'm not sure why you took the morning after pill, but the birth control pill will still be effective even though you took the morning after pill. The morning after pill doesn't make the birth control pill less effective.