Does the birth control pill work effectively for ALL women?

Here's why I am asking: my mom was on the pill when she get pregnant with adjectives three of my younger siblings. I'm the only one that she wasn't on birth control when she get pregnant. Why? She took it everyday and around the same time (within two hours). Could it be that two hour difference, or lately because it's not quite as powerful for some women? I'm asking because I'm on birth control and I want to know how effective it's going to be for me, since I probably would be similar to her..
Answers:

Do any other women go through this!?

no, miserably it does not work on all women duplicate way. what everybody seem to forget is, that nowadays nearby are quite profoundly of products, using different substances, which have different effects, strengths and so on. i am sure that if u explain this to ur gyn, he will know how to perform adjectives the necessary test and be able to prescribe something, that will be decisive enough.
oh, and btw, usually not abundant women admit to enjoy forgotten the pill, and tend to blame it on their ineffectiveness. 'cause u forget one, or purloin one 13h late, and u r done for
:-)

If you are on the Pill consequently how?

Birth control does not work on ALL women. There are quite a few that it doesn't work on. My husbands sister be and she got pregnant. I honestly don't know if your system would be resembling your mothers or not. I would talk to your doctor and I'm sure they can answer you.

Started My length help?

My daughter get pregnant with adjectives 3 of her kids while on bcp.