What Not to Do During Pregnancy: Common Myths vs Facts

Pregnancy advice comes at you like confetti—fun until it sticks everywhere and you can’t see straight. Your aunt says no spicy food, your coworker swears you can’t raise your arms, and the internet? A circus. Let’s cut through the noise. Here’s what NOT to do during pregnancy—myths vs facts, minus the drama.

Myth: “You’re Eating for Two”

You’re not eating for two full-grown humans. You’re eating for you… and a very small roommate. Most people only need a modest bump in calories, not a buffet.
What to actually do:

• First trimester: Often no extra calories needed.
• Second trimester: Add about 300–350 calories daily (think: a yogurt and a banana).
• Third trimester: Around 450 extra calories daily (hello, hearty snack).

Your body needs nutrients, not just calories. Focus on protein, fiber, healthy fats, and prenatal vitamins (for folic acid, iron, DHA). And FYI, you can enjoy dessert—just don’t make cake its own food group.

But what about cravings?

Cravings happen. If you want pickles at 10 p.m., go for it. If you crave laundry detergent or dirt (yes, pica exists), talk to your provider ASAP. That’s one myth we don’t play with.

Myth: “No Coffee Allowed, Ever”

Good news: You don’t need to break up with coffee. You just need boundaries.
Fact: Most guidelines say up to 200 mg of caffeine per day is fine. That’s about one 12-oz coffee or two small cups of tea. Watch sneaky caffeine in soda, energy drinks, and chocolate.

Energy drinks = still a no

They pack high caffeine and stimulants. Your heart and your baby will thank you if you skip them.

Myth: “Skip Exercise—You Might Shake the Baby”

If only babies were that delicate. Movement helps your energy, mood, sleep, and labor prep. Unless your provider says otherwise, keep moving.
What’s great to do:

• Walking, swimming, prenatal yoga – easy wins.
• Strength training – use moderate weights, focus on form.
• Pelvic floor work – your future self will send a thank-you card.

What to avoid:

• Contact sports (no thanks to elbows and falls).
• Hot yoga/saunas—overheating isn’t the vibe.
• Scuba diving—pressure changes aren’t safe for the fetus.

Wait, can I run?

If you ran pre-pregnancy, you can often keep going. Slow down if anything feels off, stay hydrated, and watch your center of gravity. IMO, your body will be brutally honest with you—listen to it.

Myth: “You Can’t Touch Fish”

Fish isn’t the villain; mercury is. And even mercury has nuance. Fish gives you omega-3s (hello, brain development), so you actually want some.
Safer choices (2–3 servings/week):

• Salmon, sardines, trout
• Shrimp, pollock, tilapia
• Canned light tuna (limit albacore to ~1 serving/week)

Avoid high-mercury fish:

• Shark, swordfish, king mackerel, tilefish

And yes, skip raw seafood during pregnancy—sushi with raw fish, oysters, etc. Cooked sushi (like shrimp tempura or veggie rolls) still slaps.

Myth: “No Cheese for Nine Months”

Cheese lovers, breathe. You can eat cheese—just choose pasteurized. The concern is listeria, which loves unpasteurized dairy.
Great options:

• Pasteurized cheddar, mozzarella, Swiss, parmesan
• Pasteurized soft cheeses like brie, feta, goat

Avoid:

• Unpasteurized soft cheeses (check the label)

Bonus food safety tips

• Heat deli meats until steaming to reduce listeria risk.
• Skip undercooked meat/eggs. Your brunch can wait for runny yolks.
• Wash produce well (especially leafy greens).

Myth: “A Glass of Wine Is Fine”

Alcohol in pregnancy? Not worth the gamble. Research hasn’t found a safe level. That means no alcohol during pregnancy.
Want the vibe without the risk? NA wines and beers can scratch the itch. Mocktails exist for a reason. Your baby gets the VIP list; alcohol doesn’t.

Myth: “Do Not Dye Your Hair or Paint Your Nails”

You can still feel cute. Modern hair dye and nail polish don’t absorb in meaningful amounts when used properly.
Play it safe:

• Wait until after the first trimester for hair dye if you can, just to be cautious.
• Use well-ventilated spaces for hair, nails, and paint.
• Wear gloves if you’re DIY-ing.

Acrylics and gel? Usually fine, but avoid inhaling fumes and take breaks if you feel lightheaded.

Myth: “You Can’t Sleep on Your Back Ever Again”

After mid-pregnancy, lying flat on your back can compress a major vein and make you dizzy. But you don’t need to panic if you wake up that way.
Pro tips:

• Favor your left side for best blood flow.
• Use pillows between knees and behind your back for support.
• If you roll onto your back, just roll back—no alarm bells needed.

How to build a pillow fortress

One under the belly, one between knees, one behind your back. It’s part support system, part cuddle pile. Works like a charm.

Things You Actually Shouldn’t Do

Let’s separate the real no-gos from the internet myths. Some things truly deserve a hard pass.
Hard stop list:

• Smoking or vaping nicotine – linked to low birth weight, preterm birth, and other complications.
• Alcohol – no safe amount known.
• Recreational drugs, including marijuana – not considered safe in pregnancy.
• Unprescribed herbal supplements – “natural” doesn’t mean safe; many lack safety data.
• Hot tubs and saunas – overheating raises risks, especially in early pregnancy.
• Litter box duty – risk of toxoplasmosis. Delegate or wear gloves and wash hands well.
• Unnecessary X-rays – tell providers you’re pregnant so they can adjust imaging.

Stuff to clear with your provider

• Any new medications or supplements (even OTC or “natural”).
• Travel plans after 32–34 weeks, or any high-altitude or remote trips.
• Work exposures to chemicals, heavy lifting, or radiation.

FAQ

Can I drink herbal teas?

Some are fine; some are not. Safe-ish bets include ginger, peppermint, and lemon balm. Avoid or limit teas like licorice root or certain “detox” blends. Always check labels and run anything new by your provider, FYI.

Is it true I can’t lift anything heavier than a gallon of milk?

Not exactly. If you lifted pre-pregnancy, you can often keep lifting with adjustments. Use good form, avoid breath-holding, and skip max lifts. If lifting triggers pain, dizziness, or leaking, scale back and ask your provider.

Can I travel by plane?

Usually yes, until late third trimester. Walk the aisle, hydrate, and wear compression socks to reduce clot risk. Check airline policies and talk to your provider if you have complications or a high-risk pregnancy.

Do I need to avoid all skincare actives?

You should avoid retinoids (like tretinoin, isotretinoin) during pregnancy. Many people still use vitamin C, hyaluronic acid, azelaic acid, and low-strength AHAs safely. When in doubt, bring your routine to your next prenatal visit for a quick review.

Is deli meat totally off-limits?

You can eat it if you heat it until steaming. Listeria doesn’t RSVP to pregnancy, so take the extra step. Or choose canned tuna, rotisserie chicken (hot), or cooked leftovers for a simpler path.

What about cleaning products?

Most household cleaners are fine with ventilation and gloves. Skip bleach-ammonia combos (never mix), heavy solvents, and strong fumes. If you feel woozy, step out and let someone else play hero. IMO, delegation is a pregnancy superpower.

Bottom Line

Plenty of “don’ts” during pregnancy are myths dressed as wisdom. Keep caffeine reasonable, move your body, eat smart (with pasteurized cheese, bless), and skip the real risks like alcohol, smoking, raw seafood, and overheating. Ask questions, trust your gut, and remember: you’re growing a human, not applying for astronaut training. You’ve got this.