It depends on the particular method used. The failure rate for Birth Control methods is usually given as the percentage of women using that method who get pregnant within a year, and ranges from nearly 30% (spermicides alone as typically used) down to less than 1% (implants, vasectomy, tubal ligation). For comparison, the failure rate for not using any form of birth control at all is about 85%.
Can birth control be ineffective while taking metronidazole?
Yes
birth control increases your chances of not getting pregnant
You should not mix pills with your birth control pills. This candamage your insides or cause your birth control to be ineffective. Mixing pills is dangerous.
No, birth control decreases your risk of getting pregnant.
The chances are slim but birth control can never be 100 percent trusted especially if you are new to it. Chances are your not pregnant.
Once you stop taking the birth control pills you are able to become pregnant.
Birth control pills are not effective until you have used them for 7 days. Thus, your chances of being pregnant are the same as if you were not on birth control at all.
There is no chance. If your period was on it means that there is no way that you could have been ovulating. Don't worry.
No. There are very few medications that have an effect on BCP.
the siple answer is yes. nothing is 100% except abstinance. Being on birth control just reduces your chances of getting pregnant dramatically making it 99% effective. I just say this because I got pregnante with my first while I was on birth control.
Yes. However you decrease the chances by taking your birth control correctly and by using condoms.