How many days after intercourse does conception occur.shortest to latest..if unsure of ovulatio..tx?

Depends on cycle day: Sperm at viable 5-7 days in the female tract. If you ovulated during this time period...

With ovulation: Conception would likely occur within hours of ovulation. A woman can have sex 6 days before ovulation and have a 3 out of 1000 chance for conception. Having sex closer to the time of ovulation can increase the conception rates to about 10% to 15% each cycle. But, again, conception occurs when the sperm and egg meet and that can only happen after ovulation - the egg is receptive for about 24 hours