In general, I'm convinced women wear clothes that are far too tight. If you can't gain or loose ten pounds without having to buy a new wardrobe, then I would argue they are not good clothes. One's vestments should drape attractively and be forgiving of the natural slight fluctuations of one's body fat content. Maternity clothes are that in the extreme. You should be able to wear the same dress at 4 months that you wear at 8 months and it still feel comfortable and attractive.