Okay...so YES it is a sign, but I have to tell you that just like all signs/symptoms of pregnancy not every woman gets every symptom and likewise, not every woman gets the same signs/symptoms with each of their pregnancies.
Me for instance, I didn't have ANY signs/symptoms with my first, no breast tenderness, no morning sickness, no nothing, I even had a period for 5 months.
With my second however within days of conception my breast were so flippin tender it wasn't even funny, MILD tenderness my A%&....I was so ULTRA sensitive especially around the nipple. Just having a bra on, or worse yet, no bra and then having my shirt touch them was excrutiating.
But, just like with anything, sore nipples could also be a sign/symptom of other things as well...not just pregnancy.
Best of luck,
at 12:46 AM on Apr. 12, 2010