How long can semen stay inside of the vagina if not fully released after sex?

an if its not fully released after sex, when it does oventionally come out does it have a foul oder ?

Answers:

I'm kind of confused by your wording, on the other hand I will try to answer your question... When you have sex and he ejaculates, yes, most of it runs out of you when he withdraw or you stand up. However, there is some leftover and it is mixed with your raw lube (white/clear mucous discharge) and both will run out of you after for 1-4 days depending on your body.

You have your own scent and he has his own scent, sometimes when they mix, it won't smell good. The smell will be stronger to you coming from your body. If you don't enjoy any other symptoms besides the odor, my guess is that you are fine.
Different types of infections:

Signs of yeast infections:
White, cottage cheese-like discharge
Swelling and pain around the vulva
Intense itching

Signs of bacterial vaginosis:
A white, gray or yellowish vaginal discharge
A fishy odor that is strongest after sex or after washing near soap
Itching or burning
Slight redness and swelling of the vagina or vulva

If you are concerned, see a doctor.

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