How likely is a first encounter hiv exposure as a negative male having sex with a possible hiv positive woman it was a one time brief exposure maybe 3 minutes insertive ?

Possible but low: Chance of heterosexual HIV transmission is generally low as demonstrated in many studies. Female-to-male transmission is 0.04% per act or, in theory, about 4 cases of HIV transmission per every 10,000 acts of vaginal sex with a woman who is HIV positive.

Low: Although there is no such thing as 100 percent the risk would be very low. Higher risk exposure associated with per cutaneous sticks. Contact with mucous membranes and/or non-intact skin with blood , tissue, or body fluids from infected individual.

See a doctor now: You should see a doctor now, without delay, to ascertain if post-exposure prophylaxis may be applicable.

Very low: The odds are less than 1 in a thousand