Not as accurately as they like to think. I somehow got on their “pregnant” list (which they then sold) when there was no possible chance of that.
I’m glad to read that. Did you find out why they reached that conclusion?
http://www.forbes.com/sites/kashmirhill/2012/02/16/how-target-figured-out-a-teen-girl-was-pregnant-before-her-father-did/