Lifesite News has put up a little slide show of images showing how various types of birth control operate. Each image is taken from the pharmacology section of info that the drug manufacturers publish for health care providers. None of this information is new, and if you never heard it from your doctor or CNP………. well……
Part of birth control effectiveness is due to processes that occur AFTER fertilization.
You can learn about some more birth control at the Chemical Abortion page listed above.