When your breasts are preparing for lactation, the concentrated cellular construction inside your breasts that is developing your acini tissues requires extra nutrients that are transported to your breasts  in your blood. That requires your blood vessels to dilate, often making them "appear" for the first time under the surface of your breast skin. If you notice the vessels increasing in number or size, that  would generally indicate that your breasts are moving closer toward full lactation. They will continue to enlarge and maintain their presence during the time that you are lactating because the extra nutrients are needed to continue the production of milk.

NOTE: If your breasts show a CHANGE of any kind that is not readily accountable for, please be sure to bring this to the attention of your OB/Gyn or your Breast Surgeon.

These examples are shown as a relative guide to share with others so that they might be able to better determine your progress in reaching full lactation. It is the amount that they change that is important.