Are you pregnant or nursing, then do you think nursing bras are really necessary? Are you familiar with the discomfort and irritation of wearing your everyday pre-pregnancy bra? Maybe they just don’t fit well anymore or your favorite lace bras cause irritation. As unlike a nursing bra, which is designed for nursing women traditional bras do not have room for the diaphragm to grow during pregnancy and have a rigid metal underwire that is not recommended to wear during pregnancy or nursing.