Unlike maternity bras, it is possible to buy your nursing bras too early. If you are planning to breastfeed, the best time to buy your nursing bras is during your last month of pregnancy. Don't forget that you will need to buy two or three bras.
A well designed nursing bra has all the features of a maternity bra - support, coverage, adjustability and comfort - plus
Access
The cups should open easily allowing easy access for breast feeding. The opening should never constrict or squeeze as this can lead to blocked ducts or mastitis.
Support
When one cup is open for feeding, the other should continue to provide comfortable support.