When I was a prego, i have never gotten myself any 'maternity' wear except for adjustable waistband leggings and palazzo pants which i wore under the belly.

As for tops and dresses, there are many styles nowadays which can accommodate a pregnant figure such as oversized/baggy or batwing sleeves style tops and also maxi dresses. As i own various of such outfit styles in my wardrobe already, i never really needed 'maternity' wear.. oh except of course, maternity bras (bras without underwires) ;P