As such unprotected sex can increase hiv risk in a woman if the man ejaculates into her vagina.
													
																	Chances of getting hiv from a one night stand with a woman. 
									
	
		
	
																	What are the odds of getting hiv from a one night stand. 
																	This translates into a one in 100 chance of getting hiv during vaginal intercourse. 
																	Your risk is much lower because your partner s status is unknown. 
																	After all she may have the same thoughts or concerns about whether you have hiv but also might not bring up the subject. 
															
													
									
	
		
	
																	For one woman a one night stand in college had lifelong implications she never expected. 
																	The duration of exposure and volume of infected fluid are also key factors in determining whether a person gets infected or not. 
																	The average estimated risk of infection for this activity with a woman known to carry the virus is 5 out of 10 000 or 1 in 2 000. 
																	Let s start by scrubbing the one night stand bit from the question. 
															
													
									
	
		
	
																	Of course there is no risk of getting hiv from a woman unless she has hiv so it s good to talk about this with any potential sex partner.