Quoting Suckafish:" So a friend of mine got into a debate with some class mates and I'm confused by their logic as is my ... [snip!] ... birth control doesn't seem right. I was always told that birth control (the pill, mostly) stops ovulation all together. TIA"
i've never heard of it building a 'shield' i've always heard the same as you...that it stops ovulation.
the egg does have a 'sac' thing around it before it bursts out of the ovary...maybe they're getting that confused?
can't remember what it was called...ugh..and it was the last thing we studied in a &p 2..i should look that up.