After I had DD I noticed I starting getting some. So about 28-ish. Now, 5yrs and 3 kids later, I couldn't count them if I tried. And if I pulled them out I would definately be kinda thin on top, lol! Now, I dye my hair to hide my greys, not just because I like to change the colour of it! It's not too bad really, I'm just vain! They are noticable when you look up close and they're getting worse, but if I didn't colour my hair, from a few metres you couldn't see I had grey hairs! My mum was pretty grey by the time she was 40, but my dad is only just starting to get more grey hair than balck at 67. I'm thinking I take after mum with my grey hairs unfortunately!