Women are supposed to have a smell. Having no smell at all would be a sign of an unhealthy vagina. However, if you notice that your smell gets stronger than usual or if you see any strange discharge or anything like that, then it could be the sign of an infection.


Many sites say that your vagina should have a smell, but that it should not be a bad smell. I hate how they word that, however. What is or is not a "bad" smell is an opinion. Some people really hate the smell of a clean and healthy vagina, while other people love it. So I usually steer clear of using the phrase "bad smell."

this site is interesting:
"what is the best way to clean my vagina?

Most doctors say that it is best to let your vagina clean itself. The vagina cleans itself naturally by producing mucous. Women do not need to douche to wash away blood, semen, or vaginal discharge. The vagina gets rid of it alone. Also, it is important to note that even healthy, clean vaginas may have a mild odor.


Regular washing with warm water and mild soap during baths and showers will keep the outside of the vagina clean and healthy. Doctors suggest women avoid scented tampons, pad, powders and sprays. These products may increase a woman's chances of getting vaginal infections.


My vagina has a terrible odor, can douching help?

No. Douching will only cover up the smell. It will not make it go away. If your vagina has a bad odor, you should call your doctor right away. It could be a sign of a bacterial infection, urinary tract infection, std or a more serious problem."
http://www.4woman.Gov/faq/douching.Htm

also, sex can actually make a difference. Semen and the bacteria in vaginas can combine to make a slightly stronger smell. Then that's often combined with sweat. So it's not unusual to find that your smell is stronger after sex. Chances are you're fine if you have always smelled this way, and you don't itch, or have funny looking discharge or anything like that. No harm in talking to your ob-gyn about it again the next time you go in, however.