A word about vaginal odor: All women have it. It's completely natural and not something to stress about. In fact, most men consider that scent arousing. That said, if you notice that you smell unusually fishy or your odor is particularly strong post-sex or after washing your vagina with soap, you might have bacterial vaginosis or BV--an easily treatable infection caused by an imbalance of the normal vaginal bacteria. You should see your gynecologist, who can test for it and, if you come up positive, prescribe an antibiotic that should clear it up. One final note: While BV isn't a sexually transmitted disease (STD), vaginal odor can sometimes be a sign of one, so your gynecologist may want to rule out that, too.
From my book: