One of the first signs of pregnancy is a growing bust. Every woman’s body is different, but most women grow 1-3 cup sizes during the course of their pregnancy.
Some women also need to go up a band size because of their expanding belly and rib cage. However, don’t go too loose. The bra band is responsible for 90% of the bra’s support, so a snug band that stays in place is very important.
The quickest change comes right after you give birth when milk starts to flow. This is called engorgement (and for good reason!). Engorgement is the point when your breasts are their largest and heaviest.
If you plan on nursing, your breast size can change from day to day in the beginning. Once you and baby are on a regular feeding schedule, you can go back to wearing a constant bra size. Many women go back to their pre-baby back size but need to wear a cup size that is 1-3 sizes larger than before.
Your first breast feeding bras should be soft cup nursing bras. These non-underwire nursing bras allow room for your breasts to grow during engorgement and have flexible sizing that will help you stay comfortable during the first few weeks of nursing. You should have at least two soft cup nursing bras to alternate wearing during this time. After your cup size goes down, these bras will make great sleep nursing bras. Great for those middle of the night feedings!
Once your baby is breastfeeding on a regular schedule, you can really expand your nursing wardrobe! Modern nursing bras are available in a wide variety of colors and styles, so you’re not just stuck with unflattering white bras.
Most women can comfortably wear an underwire nursing bra at this time. Underwire feeding bras provide great support for heavy breasts. It is very important that you are wearing the right bra size. In the correct cup size, the underwire will lie comfortably under the breast and not interfere with milk production.
Source: lindasonline