Most birth control works like this: it takes anywhere from seven to ten days to begin working. The pill then makes your body think its pregnant (simplified explanation), and so you cannot get pregnant. When you stop taking the pill - the fourth week of your now-28 day cycle (four seven-day weeks), your body knows you aren't and so makes you have a period.
You are unlikely at all to get pregnant while on the pill, although it is only 99% effective. For that first week, you'll need to use a supplemental birth control, but after that, you should be fine.
Some antibiotics will interfere with the medication, as will stomach problems - if you throw up the medicine, it obviously won't work.
2007-12-09 12:10:42
·
answer #1
·
answered by Grainne 3
·
0⤊
1⤋
Nope, when you are on the pill any time is as effective as any other time. That includes when you are taking the placebo (non-active, sugar) pills.
It works by inhibiting ovulation (amongst other things) and if you are not ovulating then there is no "safe/danger" period like in a normal cycle. If it goes wrong and you do ovulate, you can't necessarily tell, because it changes the temperature and mucus that people usually use as signs to tell when they're ovulating. Also, even if you ovulate, because it thickens the cervical mucus and changes the uterine lining too, it's unlikely an egg would implant.
That's assuming you take it correctly. Take it late, miss a day or take medication that interferes with it, and you have to use back-up again for I think 7 days, maybe 14 depending on the type.
2007-12-09 20:07:48
·
answer #2
·
answered by Anonymous
·
1⤊
0⤋
I am not a doctor, but I have been on the pill for a few years without any problems. Just wait the 7 days and you should be fine.
2007-12-09 20:04:40
·
answer #3
·
answered by Sarabear622 2
·
0⤊
1⤋
You should use protection for 7 days if you are doing the Sunday start. Had you started the first pill on day one of your period you would have been protected (from prgnancy) right away.
2007-12-09 20:07:11
·
answer #4
·
answered by margarita 7
·
0⤊
1⤋
You need to be on it for THIRTY days before its effective.
You ovulate exactly (normally) two weeks from the end of your period.
But, I got pregnant on the pill and I had been taking it religiously for 4 years.
So, use a condom unless you would be fine with a baby.
2007-12-09 20:05:08
·
answer #5
·
answered by vhesponage 5
·
1⤊
2⤋
Birth control pills can cause abortions without you even knowing it. You really need to check out this website before you think about having sex with BCP's. Try condoms instead.
http://www.prolife.com/BIRTHCNT.html
2007-12-09 20:24:54
·
answer #6
·
answered by Anonymous
·
0⤊
2⤋
you need to finish one pack before you are protected
2007-12-09 20:12:59
·
answer #7
·
answered by alizenena 1
·
0⤊
2⤋