However there is no need to feel concerned. All you need to know is the science behind it.
Hormones cause the change in breasts.
Like many other symptoms and changes during pregnancy, breast changes are also a result of hormonal changes. During pregnancy, large amount of estrogen and progesterone are produced in the mother’s body. These hormones cause the mammary glands in the breasts to grow and branch out so that they can begin preparing for milk production and breastfeeding. This is the reason why breasts change during pregnancy.
Commonly observed changes in the breasts.
Some of the commonly observed changes during pregnancy include sore breasts, enlarged breasts, and change in nipples. Although on many occasions, there may be no or very little changes.
Sore Breasts: Early in the first trimester your breasts might feel sore or tender. For some women this is also a sign of an impending period and hence they might just ignore this feeling. You might just have the feeling of a slight tenderness when you touch your breasts. You may also experience severe pain. However, there is nothing to worry about since both these symptoms are normal and usually most intense in the first trimester.
Changes in Nipples: The nipples may become larger and darker as your pregnancy advances. You may also notice small goose bumps or pimple like white areas called Montgomery’s Tubercules on your areola. These are the oil glands that provide the lubrication to facilitate suckling by your baby when you breastfeed your little one.
Enlarged Breasts: By the end of first trimester or the beginning of second trimester you may find that your breasts have begun to grow. This happens because the tissues inside the breast are getting prepared for nursing the baby.
Fluid leaking: Towards the end of their pregnancy few mothers may find that their breasts leak out a fluid or that their nipples have a film or caked substance. There is nothing to worry about. This fluid is called Colostrum. It is the first milk your body makes that provides your baby with all the nourishment and a dose of immunity and protection that she needs to start her life. So, do not worry, just use a breast pad if it becomes noticeable or in case it makes you feel more comfortable
No Breast Changes: In some cases, there are either no changes or very slight ones in your breast. Don’t panic, it is very normal and it has got nothing to do with your ability to have a successful pregnancy or breastfeeding relationship.
The change is normal, so should be your attitude towards it.
During pregnancy, you need to take extra care of your breasts. Some useful measures that you can undertake include supporting the breasts with a well-fitted bra. If you are exercising, make sure to change into a sports-bra. Always go for a bra made out of soft cotton. Avoid synthetics as they do not allow air passage and may cause you discomfort due to excessive sweating. Also, avoid clothes that are too tight. During this period the skin on your breast expands due to breast enlargement. So moisturize the breasts daily to prevent stretch marks. And make sure to take care of breast hygiene. Remember, any infection in your breasts may affect the health of your baby when you begin breastfeeding.