I don't think they would. I would suspect that Target doesn't consider pregnany to be a medical condition that someone is ashamed of. It's a huge change in a person's life. One that's usually celebrated; and, they want to be the store you go to for your pregnancy needs by hooking you in with advertisements.

Personally, I don't find a problem with this at all. It's a life status "pregnancy" and the later status "with children". It's about the same as if I bought a lot of sports gear, so Target started pre-emptively sending me coupons on new sporting equipment for the upcoming season, and telling me of late-seasons sales.

I gave them the information by purchasing there. I know I did, so ... I just can't see why this is bad in the general case.