Underwire nursing bras are best worn after 6-8 weeks postpartum when breast size has regulated. Wearing an underwire bra that is too small or while breasts are changing may lead to clogged milk ducts and breast infection. We offer FREE SHIPPING on all Bravado brand bras as well as on orders over $60 so it's easy to try new styles. Orders under $60 (excluding Bravado) have a low $6 flat rate shipping fee. Visit our fitting room for help with your nursing bra size or call us for support!