Your boobs are going to go through all sorts of changes throughout pregnancy and beyond. We’re talking size, shape, color – it’s a journey. In the 2nd trimester specifically, they’ll probably get larger and heavier, and the veins surrounding your boobs will become more apparent beneath the skin. Your nipps and areolas might grow and darken, with some super fun small bumps making their way to the surface.

Before you start freaking out, just know that your nipples, at least, should return to their pre-pregnancy color and size, though we can’t speak for the rest of your boobs!

According to the American Pregnancy Association, here are some of the lovely changes to your lady friends that you can expect during your pregnancy.

Around weeks 6-8, your breasts will get bigger and continue to grow throughout your pregnancy. Expect to go up a bra cup size or two. Your breasts may feel itchy as the skin stretches and you may develop stretch marks.

Breast pain is often the first symptom of pregnancy, occurring as early as one to two weeks after conception — technically, weeks three and four of pregnancy. Not to worry. That sore boob sensation generally peaks in the first trimester when your body is flooding with hormones.

Darkening of nipples and areolas (the skin around your nipples) due to hormones that affect the pigmentation of the skin. Darkened veins along with your breasts (due to the increased blood supply to your breasts)

Around month three, your breasts may start leaking a yellowish, thick substance known as colostrum. Some women may leak earlier, some never at all.

Nipples stick out more, and the areolas and nipples will grow larger. Hey, it’s kind of hot! Chalk it up to hormones prepping you for breastfeeding.

You may also notice little bumps on the areolas. These are small oil-producing glands called Montgomery’s tubercles. Studies have found between 30 and 50 percent of pregnant women notice Montgomery’s tubercles. Their primary function is lubricating and keeping germs away from the breasts. Whoah. Science.