Fitting a pregnant woman into a bra she has outgrown can prove to be challenging especially during her 3rd phase where she can see an average gain between 20 to 30 pounds. The effects of badly fitted bras can vary from minor discomfort and pain to serious issues like posture problems and backaches. Hence the reasons why choosing a maternity bra, plus sized can be so apparent.
Basically a maternity bra is meant to be worn during a woman's expectant stage. Besides putting on weight, a woman's breasts get heavier and grow bigger. Lacking the necessary support will cause your breasts stretch. And over long periods, makes one feel very uncomfortable. Maternity (or pregnancy) bras offer better comfort and (most importantly) chest support that usual intimates can't match - due to the elastic materials found.
Finding your breasts expanding by a cup or more should not come as a surprise especially when reaching your final stages of expectancy. It can be caused by factors like hormone changes in your body or even the food intake. You may see the need to up-size your current maternity bra to plus sized. It is all about matching the comfort level to the right size. However, do not worry over how plus sized can be measured. It's really the same as measurements are taken similarly you take for the other bras.
Getting larger bras in preparation for expectancy make poor substitutions from the goodness of a plus size maternity bra. High costs together with the constant expanding in breast shapes/sizes serve as strong stopping factors for women to take into consideration.
Finally it is not possible for someone to decide what you should wear other than yourself. The decision of better, more comfortable intimates can impact your mood for the day even throughout your wholepregnancy. Some people say when you are happy, your baby probably feels the same. Joy or discomfort? You decide.