30 Weeks Pregnant: Symptoms, Baby Development and What to Expect

At 30 weeks pregnant you are about 7 months along, in the third trimester, with about 10 weeks to go until your estimated due date.

At 30 weeks pregnant your baby weighs nearly 3 pounds, according to Mayo Clinic, and is about to start gaining weight quickly. You may be feeling it in your pelvis, your breathing and your sleep.

This guide covers development, size, symptoms, appointments, sleep, how partners can help and the signs that mean you should call. Every clinical detail was read in October 2026 on the primary sources named in the text.

30 Weeks Pregnant at a Glance

How the weeks are counted. Cleveland Clinic explains that your due date is 40 weeks after the day your last period started, and Mayo Clinic notes that you are not actually pregnant during the first week or two of that count. That is why Mayo Clinic describes week 30 as 28 weeks after conception. Cleveland Clinic adds that an ultrasound can lead your provider to adjust the due date, usually by only a few days.

Mayo Clinic describes the third trimester as the final 12 weeks of a full term pregnancy. Our third trimester guide covers the whole stretch.

Your Baby’s Development at 30 Weeks

Is the baby fully developed at 30 weeks? Not yet. Mayo Clinic places the end of most major development at week 31, and labor before 37 weeks is preterm (March of Dimes).

How Big Is Your Baby at 30 Weeks?

Mayo Clinic gives a week 30 figure: more than 10 1/2 inches (270 millimeters) long from crown to rump and nearly 3 pounds (1,300 grams).

Crown to rump leaves out the legs, so head to heel figures elsewhere look longer. Weight climbs fastest: Mayo Clinic says rapid weight gain starts around week 31. These are averages, and healthy babies vary. No primary source we read gives a fruit comparison for week 30.

A 30 week ultrasound? MedlinePlus says that, apart from the group B strep test, there are no routine lab tests or ultrasounds for every pregnant woman in the third trimester. UPMC says an ultrasound may be ordered if there are concerns about the baby’s growth, the amniotic fluid or the placenta.

30 Weeks Pregnant Symptoms

UPMC lists back and hip pain, Braxton Hicks contractions, trouble sleeping, frequent urination, heartburn, hemorrhoids, leaking colostrum, nerve pain, shortness of breath and swelling as third trimester changes.

• Back and hip pain: Mayo Clinic says hormones loosen the connective tissue in your pelvis. It suggests supportive chairs, heat or cold packs, regular walks and low-heeled shoes with arch support.
• Braxton Hicks contractions: Mayo Clinic describes slight tightenings, more common in the afternoon or evening, and says to call if you have more than six in an hour that keep getting stronger. See what contractions feel like.
• Shortness of breath: good posture and resting on your side may help (Mayo Clinic). UPMC says to get medical help immediately if shortness of breath is sudden or severe.
• Heartburn and constipation: Mayo Clinic suggests small, frequent meals and not lying down after eating, plus fiber and fluids. No laxatives without your provider’s OK.
• Frequent urination and leaks: Mayo Clinic suggests Kegel exercises, and says to call if you think you are leaking amniotic fluid or if peeing burns.
• Hemorrhoids and varicose veins: raise your legs and eat plenty of fiber (Mayo Clinic). Ask which creams are safe (UPMC).
• Nerve pain: shooting pain down a leg (UPMC). Tell your provider right away about any weakness.
• Swelling: UPMC says to seek treatment for sudden or extreme swelling, which can be a sign of preeclampsia.

Pelvic pressure at 30 weeks. Mayo Clinic says pregnancy hormones loosen the connective tissue in your pelvis, and UPMC says pelvic and hip pain can increase when the baby drops, which it places around week 36. But March of Dimes lists “pressure in your pelvis or lower belly, like your baby is pushing down” as a sign of preterm labor before 37 weeks. New or growing pressure, especially with cramps or tightening, means call right away.

Your Body and Belly at 30 Weeks

At each third trimester visit, MedlinePlus says, your provider weighs you, measures your abdomen to see whether your baby is growing as expected, checks your blood pressure and checks your baby’s position.

• Your baby’s position: UPMC says the head may drop lower into your pelvis around week 36. If your baby is bottom first later on, our breech baby guide explains the options.
• Appetite: UPMC reports that ACOG puts your extra need at about 450 calories a day in the third trimester.
• Feelings: Mayo Clinic says stress and fear of childbirth are common. Journaling, music and a childbirth class can help. Tell your provider if anxiety feels overwhelming.

Your baby’s movements. MedlinePlus says that if your baby seems to be moving less, you can eat a snack and lie down for a few minutes, and if you still feel little movement, call your provider. Ask how they want you to track movements.

Prenatal Care, Tests and Appointments Around Week 30

UPMC and MedlinePlus describe different visit schedules, so follow your provider’s.

Vaccines. These windows are from the CDC page as read in October 2026 (updated October 7, 2026), which also says a COVID-19 vaccine during pregnancy can protect you and your baby from severe illness. Guidance changes, so confirm every vaccine with your provider.

What to Do This Week: A Simple Checklist

• Ask about the Tdap vaccine if you have not had it yet, and whether you will want the RSV vaccine once week 32 arrives.
• Confirm your glucose screening is done, or ask when it is booked.
• Choose a pediatrician (UPMC).
• Install the car seat (UPMC).
• Write a birth plan and go over it with your provider (Mayo Clinic).
• Pack a hospital bag, and if you have other children, line up childcare for when labor starts (UPMC).
• Save your provider’s after-hours number and read the warning signs below.

Sleep at 30 Weeks Pregnant

MedlinePlus says sleep gets harder as your baby grows: a good position is hard to find, and bathroom trips, shortness of breath, aches and heartburn (often worse at night) add up.

Sleep position. MedlinePlus says side lying with knees bent is likely most comfortable, many providers recommend the left side, the right side is fine too, and it is best not to sleep flat on your back. UPMC says to avoid back sleeping as your belly grows, because the uterus can press on a blood vessel and reduce blood flow to your baby. If you wake on your back, just roll to your side (UPMC).

• Use pillows: MedlinePlus suggests pillows under your belly or between your legs. UPMC suggests a body pillow. See how to use a pregnancy pillow.
• Mind the evening: limit caffeine, and skip big meals and lots of fluid close to bedtime (MedlinePlus).
• Wind down: a warm bath (MedlinePlus), deep breathing and daytime walks (UPMC).
• Keep a rhythm: same bedtime and wake time, plus short naps (MedlinePlus).
• Leg cramps: if one wakes you, MedlinePlus says to press your feet hard against the wall or stand on that leg.
• No sleep aids without your provider: MedlinePlus says not to take any, including herbal products. Read can you take melatonin while pregnant.

For Partners: How to Help at 30 Weeks

• Own one checklist job from start to finish, such as the car seat or the pediatrician shortlist.
• Carry laundry baskets and groceries so a sore back gets a break.
• Help at night with water, pillows and a calm evening routine.
• Learn the preterm labor signs below, and make the call yourself if she is unsure.

Looking Ahead: What Comes Next

• Week 31: Mayo Clinic says most major development is finished and rapid weight gain begins. See 31 weeks pregnant.
• Week 32: toenails are visible and lanugo starts to fall off (Mayo Clinic), and the CDC’s RSV vaccine window opens (September to January). See 32 weeks pregnant and 33 weeks pregnant.
• Week 36: the CDC’s Tdap and RSV windows close, and visits become weekly (MedlinePlus).
• Week 37: labor is no longer preterm (March of Dimes).
• Your due date: Cleveland Clinic says only about 4% of babies are born on their due date.

Looking back? See 29 weeks pregnant or 27 weeks pregnant.

Related Betteroo Guides

• 29 Weeks Pregnant
• 31 Weeks Pregnant
• Third Trimester Guide
• How to Use a Pregnancy Pillow
• Preeclampsia
• Signs of Leaking Amniotic Fluid

When to Call Your Provider

Signs of preterm labor. March of Dimes defines preterm labor as labor before 37 weeks and says that if you have even one of these signs, call your provider right away:

• Regular or frequent contractions that make your belly tighten. They may or may not be painful.
• A change in your vaginal discharge (watery, mucus or bloody), or more discharge than usual.
• Pressure in your pelvis or lower belly, like your baby is pushing down.
• A constant low, dull backache.
• Belly cramps, with or without diarrhea.
• Your water breaks.

Seek care right away. UPMC and MedlinePlus list these third trimester warning signs:

• A decrease in your baby’s movement.
• Any vaginal bleeding, or foul-smelling vaginal discharge.
• A severe headache, changes in your vision, or dizziness.
• Sudden or severe swelling of your hands or face, or significant swelling with rapid weight gain.
• Chest pain, a fast heart rate or difficulty breathing.
• A fever above 100.4 F, chills, or pain when you pass urine.
• Severe cramping, or regular, painful contractions.
• One leg that is swollen, red and warm.
• Thoughts of harming yourself.

MedlinePlus also says to call about any symptom that seems abnormal.

If you cannot reach your provider quickly, go to labor and delivery or the nearest emergency room. If you have severe chest pain, severe trouble breathing, heavy bleeding or a seizure, call 911. When you call, say how many weeks pregnant you are. This article is general education, not medical advice.

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