Question

 Can women get immune to birth control after a while?

Answer there is no medical "immunity" to pills. but your question is about birth control, and this has a very wide scope, including natural family planning, calendar method, tubal (fallopian tube) ligatio... Read More »
http://answers.yahoo.com//question/index?qid=20060910174915AAbbgUt

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What is the effect of Birth control pills while pregnant?

AnswerIt is not as bad as it was 20 years ago. The effects are minimal. Ask an OBGYN to be sure though.
http://wiki.answers.com/Q/What_is_the_effect_of_Birth_control_pills_while_pregnant

How do birth control or morning after pills affect pregnant women?

The morning after pill or birth control pill will not harm or end an existing pregnancy.
http://wiki.answers.com/Q/How_do_birth_control_or_morning_after_pills_affect_pregnant_w...

What are the harms of taking birth control pills while pregnant?

AnswerWhen you get your birth control pills, a small packet of information comes with them. It will list all of the harmful effects that could happen to a baby while a mother is pregnant with them... Read More »
http://wiki.answers.com/Q/What_are_the_harms_of_taking_birth_control_pills_while_pregnant

If you get pregnant while on birth control pills will you still show the withdrawal bleeding while on the placebos and would pregnancy symptoms still occur on the pill?

Answer Yes you will still have a period but it may be later and old blood. Yes pregnancy symptoms would still occur.
http://wiki.answers.com/Q/If_you_get_pregnant_while_on_birth_control_pills_will_you_sti...


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