Congrats 鈥 you鈥檝e made it to聽the second trimester! By now, you鈥檝e probably spent hours poring over books and blogs, learning all about pregnancy symptoms and聽first trimester aches and pains. And you probably fast-forwarded to the third trimester spoilers; you鈥檙e practically an expert on what happens when you lose your mucus plug and how to tell the difference between your water breaking and a 鈥渂aby just kicked me in the bladder鈥 moment. With all of that first- and third-trimester research under your belt, you聽may have neglected to learn聽much about what鈥檚 in the middle, during the (relatively) low-key second trimester. Here鈥檚 the lowdown on聽that in-between time.

A pregnant woman shops in a store

1. Morning sickness may or may not disappear.聽For many women, the second trimester offers some relief from morning sickness, due to聽a change in hormone levels. If you鈥檝e been not-so-patiently waiting for the queasiness to calm, this is likely the time when it will happen. But this isn鈥檛 the case all of the time, especially if you鈥檙e suffering from hyperemesis gravidarum.

2. A dark line starts growing on your belly.聽It鈥檚 called the linea nigra, and it鈥檚 perfectly normal. A brownish or deep pink line may show up right in the middle of your bump in a vertical pattern. While there isn鈥檛 conclusive evidence as to why this actually happens, it鈥檚 thought that changing hormones may stimulate melanocytes. Don鈥檛 stress聽鈥 the line should start fading after you give birth.

3. Body aches become more noticeable. That teeny tiny little baby you had growing inside you during聽your first trimester didn鈥檛 put tremendous pressure on your body. As your聽little one grows, the added weight and movement can聽cause your back, abdomen, and groin to ache.

4. You need more calories. Well, you鈥檙e kind of getting these in anyway. Without that pesky morning sickness, you鈥檙e ready to indulge, but an all-out binge-fest isn鈥檛 the best idea. During聽the second trimester, women who start pregnancy at an average weight (meaning that they鈥檙e not under- or overweight) should add an extra 340 calories per day, according to the CDC.

5. That belly bump starts moving.聽You聽might have been wondering if that gurgling you feel is the baby, or just gas. Now鈥檚 the time when you鈥檒l really聽feel your baby move. The second trimester may start off with butterflies in your belly, but it will progress into stronger movements.

6. It鈥檚 time for a wardrobe change. Those skinny jeans that still kinda-sorta fit during trimester one just aren鈥檛 cutting it now. At some point during your second trimester, you鈥檒l probably have to trade your regular clothes for maternity versions. Say goodbye to your pre-pregnancy-wear and聽hello to super-comfy elastic waistbands and cute flowy dresses.

7. You鈥檒l find out the baby鈥檚 sex.聽Unless you have a complication, it鈥檚 likely that you won鈥檛 have your first ultrasound until somewhere between 16 and 20 weeks. During this time, your doctor can share the boy or girl news with you聽鈥 if you want to know.

8. Some pretty rad developments are happening. That little tadpole-like creature that your doc swears is a baby is starting to make some major changes during the second trimester. Somewhere near 18 weeks into your pregnancy, your baby may start hearing. She鈥檚 also growing toenails, can suck her thumb, and has a protective coating (the vernix caseosa) growing on her. Amazing!

What鈥檚 your favorite part of the second trimester? Share your pick and tweet us @BritandCo!

(Photo via Getty)