CallaFirestormBW -> RE: Birth control = abortion? (7/22/2008 10:45:34 AM)
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In the event that anyone here -cares- how birth control pills work, here's a brief physiological run-down. Birth control pills are typically made up of estrogen and progesterone, in a carefully balanced proportion. The high levels of estrogen and increased progesterone fool the body into thinking that it is ALREADY PREGNANT, preventing ripening and release of the ova (in 99.75% of women taking the pill). Most women who are on birth control pills -do not ovulate-. There are, however, a few women who -will- ovulate anyway -- and if a woman can ovulate, she -can- become pregnant, and, in most cases (about 85%) where the egg is fertilized, the pregnancy will implant. In about 15% of cases, the change in hormones results in a "hostile uterus", which does not allow the fertilized ova to implant... but this is 15% of .1% of all women who take oral estrogen/progesterone birth control (or .015%) (Calculated on the basis that this form of birth control is 99.9% effective, and 15% of that .1% of women who get pregnant have 'hostile uterus' created from the hormonal imbalance caused by the birth control pill). CF
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