Pregnancy calls for a handful of meaningful changes to how you eat, move, sleep, and manage your health, but most of it is simpler than you might expect. The basics come down to good nutrition, staying active, keeping up with prenatal appointments, and knowing which warning signs need immediate attention. Here’s a practical walkthrough of what matters most.
Nutrition and Extra Calories
Your calorie needs don’t increase as dramatically as you might think. During the first trimester, you need roughly the same amount you ate before, around 1,800 calories per day for most women at a normal weight. That bumps up to about 2,200 in the second trimester and 2,400 in the third, which works out to roughly 300 extra calories a day over your baseline. That’s about a banana with peanut butter and a glass of milk, not “eating for two” in the way popular culture suggests.
Focus those extra calories on nutrient-dense foods: leafy greens, lean proteins, whole grains, legumes, and dairy or fortified alternatives. Iron-rich foods like red meat, spinach, and lentils help support the significant increase in blood volume your body is managing. Calcium matters for your baby’s developing bones, and omega-3 fatty acids from low-mercury fish support brain development.
Prenatal Vitamins
Start a prenatal vitamin as early as possible, ideally before conception. The two most critical nutrients are folic acid and iron. The WHO recommends 400 micrograms of folic acid daily to prevent neural tube defects, which are birth defects of the brain and spine that develop very early, often before you even know you’re pregnant. The recommendation for iron is 30 to 60 milligrams of elemental iron per day, which helps prevent anemia, low birth weight, and preterm birth.
Most standard prenatal vitamins cover these amounts plus vitamin D and iodine. If your prenatal makes you nauseous, try taking it with food or before bed. Some people tolerate gummy versions better, though these often contain less iron, so check the label.
Foods to Avoid
Food safety becomes more important during pregnancy because your immune system is slightly suppressed, making you more vulnerable to infections like listeria and toxoplasmosis. The CDC recommends avoiding:
- High-mercury fish: shark, swordfish, king mackerel, and tilefish. Low-mercury options like salmon, tilapia, and shrimp are safe and encouraged.
- Raw or undercooked meat, poultry, and eggs: this includes runny eggs, rare steak, raw cookie dough, and homemade Caesar dressing made with raw eggs.
- Unpasteurized dairy and juice: soft cheeses like queso fresco, brie, camembert, and blue-veined cheese made from raw milk carry listeria risk. Hard cheeses and pasteurized soft cheeses are fine.
- Raw sprouts: alfalfa and bean sprouts can harbor bacteria even when washed.
- Unwashed produce: rinse all fruits and vegetables thoroughly, including pre-bagged lettuce.
Caffeine
You don’t have to give up coffee entirely. The WHO and the European Food Safety Authority place the safe limit at 200 to 300 milligrams per day, which is roughly one to two standard cups of brewed coffee. Keep in mind that caffeine also shows up in tea, chocolate, soft drinks, and some medications, so it adds up faster than you might realize.
Exercise and Physical Activity
Staying active during pregnancy is not just safe, it’s encouraged. The current recommendation is at least 150 minutes of moderate-intensity aerobic activity per week, spread across several days. That’s about 30 minutes five days a week at a pace where you can hold a conversation but feel your heart rate elevated.
Activities that have been extensively studied and found safe include walking, stationary cycling, swimming, water aerobics, dancing, resistance training with weights or bands, and stretching. If you were already running, doing HIIT, or lifting heavy before pregnancy, you can generally continue with modifications as your body changes. The key is to avoid overheating and skip anything with a high risk of impact or falling, like contact sports, downhill skiing, or horseback riding.
One important note: bed rest has not been shown to prevent preterm labor, and routine activity restriction is no longer recommended for most pregnancies. If you’ve been told to limit movement, ask your provider for specific reasoning.
Weight Gain Guidelines
How much weight you should gain depends on your pre-pregnancy BMI. The current recommendations for a single baby are:
- Underweight (BMI under 18.5): 28 to 40 pounds
- Normal weight (BMI 18.5 to 24.9): 25 to 35 pounds
- Overweight (BMI 25.0 to 29.9): 15 to 25 pounds
- Obese (BMI 30.0 to 39.9): 11 to 20 pounds
For twins, those numbers roughly double. Normal-weight women carrying twins should expect to gain 37 to 54 pounds. Most weight gain happens in the second and third trimesters, so don’t be alarmed if the first trimester brings little change or even a small loss from nausea.
Prenatal Appointments
Schedule your first prenatal visit as soon as you find out you’re pregnant. After that, expect appointments about every four weeks through the first trimester. By around 12 to 14 weeks, you’ll likely hear your baby’s heartbeat for the first time using a handheld Doppler device. Your provider may also offer a first-trimester ultrasound around this time.
Visits typically increase in frequency as pregnancy progresses: every two to three weeks in the second trimester and weekly in the final month. These appointments track your blood pressure, weight, the baby’s growth, and screen for conditions like gestational diabetes (usually tested between weeks 24 and 28) and preeclampsia. Keeping every appointment matters even when you feel perfectly fine, because some complications develop without symptoms you’d notice on your own.
Sleep Position After 28 Weeks
During the first half of pregnancy, sleep however you’re comfortable. After 28 weeks, try to fall asleep on your side rather than flat on your back. Evidence reviewed by NICE found that going to sleep in a back-lying position after 28 weeks is associated with a higher risk of stillbirth and smaller birth weight compared to going to sleep on the left side. The good news: any side position carries the same low risk as the left side, so you don’t need to stay perfectly on your left all night.
If you wake up on your back, don’t panic. The recommendation is about the position you fall asleep in, since that’s the position you spend the most time in. Tucking a pillow behind your back or between your knees can help you stay on your side through the night.
Safe Medications for Common Symptoms
Headaches, heartburn, and body aches are common throughout pregnancy. Acetaminophen (Tylenol) is considered safe for pain and fever, up to 4,000 milligrams per day, though most people need far less. For heartburn, calcium-based antacids like Tums are a first option, and famotidine (Pepcid) at standard doses is also considered safe.
Avoid ibuprofen (Advil, Motrin) and aspirin unless specifically directed by your provider. Pseudoephedrine (Sudafed) should be avoided in the first trimester and if you have high blood pressure. When in doubt about any medication, including herbal supplements, check with your provider before taking it.
Warning Signs That Need Immediate Attention
Most pregnancy symptoms are uncomfortable but normal. A few, however, signal something that needs urgent evaluation. The CDC identifies these as maternal warning signs to act on right away:
- Headache: one that won’t go away, gets worse over time, or hits suddenly with severe pain
- Vision changes: flashes of light, blind spots, blurry or double vision
- Swelling: extreme swelling of your hands (can’t bend fingers or wear rings), face, lips, or mouth
- Fever: 100.4°F (38°C) or higher
- Breathing trouble: sudden shortness of breath, tightness in your throat or chest
- Chest pain or racing heart: pressure in the center of your chest, a fast or irregular heartbeat
- Severe nausea: vomiting that prevents you from drinking for more than 8 hours or eating for more than 24 hours
- Belly pain: severe, sudden, or worsening abdominal pain
- Reduced fetal movement: your baby has stopped moving or is moving less than usual
- Vaginal bleeding or fluid leaking: anything beyond light spotting
- Leg or arm swelling with redness and warmth: this can indicate a blood clot
These symptoms don’t always mean something is seriously wrong, but they overlap with conditions like preeclampsia, placental problems, and infection that progress quickly without treatment. Calling your provider or going to the emergency room is always the right call when you notice any of them.