Not to make a gross understatement, but during pregnancy, your body undergoes some serious changes. Unless you live in muumuus, that usually means your wardrobe has an evolution as well. There are some common misconceptions about dressing the bump, which Rosie Pope, pregnancy concierge and maternity clothing designer, is here to help clear up. She also gives us her closet staples for when you鈥檙e expecting. Trust us, these tips are pure gold.

1. Buy maternity clothing. A commonly held misconception about maternity clothing is that you can buy a size up for regular clothing and it鈥檒l be fine 鈥 but the problem is when you鈥檙e pregnant, your belly extends, but the rest of you likely doesn鈥檛 change as much. As Rosie puts it, 鈥淲hen you get pregnant, you don鈥檛 get taller. Your arms don鈥檛 get longer. Things don鈥檛 get wider 鈥 your belly might, but your shoulders don鈥檛.鈥 Wearing a size too large for you can result in you just looking frumpy.

2. Must-have maternity pieces. Rosie recommends investing in a few key pieces during your pregnancy. Get a loose blouse that will give you room to grow. A side-cinched dress is key for framing your belly 鈥 but a word of warning: These don鈥檛 look great postpartum. She also advises getting a dress up/dress down dress for weddings, work or whatever. Also, she dispels the myth about stripes making you look wide. According to Rosie, stripes are totally a do, so long as they are at least two inches apart!

3. Invest in a pair of maternity leggings. Leggings are a chic yet comfy option for when you鈥檙e pregnant. However, not all leggings are created equal. Rosie鈥檚 pro-tip when it comes to choosing your perfect pair is to keep an eye out for thick, good quality leggings that stretch with you. Also, do the bend test to make sure nothing is see-through from behind!

4. What to look for in a boyfriend sweater. Pair a comfy, oversized sweater with your thick, plush leggings for a complete look. When you鈥檙e shopping for a boyfriend sweater, Rosie suggests looking for ones that have skinny sleeves, even if the rest of it is drape-y. This way, it gives you some shape even when you鈥檙e in your third trimester. It鈥檚 also a great item to keep after you鈥檝e had your baby.

5. Get denim with elastic panels. Just because you鈥檙e pregnant, it doesn鈥檛 mean you should stop wearing 聽jeans. Find a pair that has elastic panels that with stretch as your tummy grows (FYI, the panels should sit UNDER your belly). Also, Rosie emphasizes it鈥檚 key to find denim that is stretchy.

6. Yes, there is shapewear for maternity. If you鈥檙e attending a formal event and you want to shimmy into a tight fitting gown, yes, there is maternity shapewear. While the legs and sides will still be structured, the belly area is loose, so don鈥檛 worry, you won鈥檛 be compressing your baby!

7. It鈥檚 not too early to get nursing bras. In your third trimester, Rosie suggests looking into the different nursing bras you might need. It鈥檚 good to have on hand some wireless bras, front clasp ones, sports bras and even night nursing bras that are more comfortable to sleep in. Just make sure when you鈥檙e buying a bra, the band fits your circumference comfortably on the last eye and hook. You can tighten it as you lose weight post baby.

8. Invest in maternity/nursing apparel. Get more bang for your buck by investing in maternity pieces that double as nursing pieces. What you鈥檒l want to look for when shopping for these is something that gives you room for belly growth but also can easily undo on top so you can nurse. Wrap dresses are perfect examples for this!

Do you have any tips for maternity style? Tweet us @BritandCo!

(Photos via Jenny Anderson/Getty + Rosie Pope Maternity)