I can't imagine not buying maternity clothes, but I guess personal clothing styles and pregnancy body shapes do vary a lot. My pre-pregnancy clothes didn't fit me at all very early in my last pregnancy. I even had to buy bigger socks! Never needed maternity undies, though. This time, I'm still able to wear most of my regular pants, although my belly is starting to push them down, and most of my shirts have gotten too short to cover my belly (socks, bras and undies still fit). Some things I buy non-maternity if the style works for my growing shape, but since I have to buy bigger clothes anyway, I might as well get what's going to fit the longest. Generally, that means maternity clothes for me. I just stay out of those expensive maternity stores and get a minimal wardrobe. Thankfully, I also saved everything from my first pregnancy and a friend is donating her old stuff to me too. I'll be set!