Your 8th Month of Pregnancy: The Complete Guide for Weeks 29–36

You’ve made it to the home stretch. The eighth month of pregnancy — spanning weeks 29 through 36 — is one of the most physically intense yet emotionally exciting phases of your journey. Your baby is rapidly gaining weight, your body is working harder than ever, and the reality of meeting your little one is finally sinking in. Here is everything you need to know to navigate this month with confidence.​

How Many Weeks Is 8 Months Pregnant?

One of the most common questions expectant mothers ask is exactly how pregnancy months align with weeks. The eighth month of pregnancy covers weeks 29 through 36, placing you firmly in the third trimester. By the end of this month, you will have only about four weeks remaining until your due date. Many women find this period both exhilarating and exhausting, which is completely normal given the amount of physical and emotional preparation happening all at once.

How Is Your Baby Developing This Month?

Weeks 29–30: Rapid Brain Growth

At 29 weeks, your baby is approximately the size of a butternut squash, weighing around 1.2 kg (2.5 lbs) and measuring close to 38 cm from head to toe. The brain is undergoing a period of intense development, forming billions of neurons and beginning to look more wrinkled as it grows more complex. Your baby’s eyes can now open and close, and they are sensitive to light — if you shine a flashlight on your belly, do not be surprised if they react. Fat is being deposited under the skin at a fast pace, giving your baby that adorable, chubby newborn look they will have at birth.

Weeks 31–32: Practicing for the Outside World

By weeks 31 and 32, your baby is roughly the size of a coconut, weighing approximately 1.6 to 1.8 kg. The central nervous system is maturing rapidly, and your baby is now capable of regulating their own body temperature to some degree. The olfactory receptor neurons are forming, meaning your baby can now distinguish strong smells. They are also practicing essential survival skills — sucking their thumb, swallowing amniotic fluid, and making rhythmic breathing movements even though their lungs are not yet breathing air.

Braxton Hicks contractions typically become noticeable around this time. You may feel your abdomen tighten and harden for 20 to 30 seconds before relaxing again. These are your body’s way of rehearsing for labor, and while they can be uncomfortable, they are not a sign that labor has started.​

Weeks 33–34: The Brain and Nervous System Complete

Week 33 marks a landmark moment: your baby’s brain and nervous system are now fully developed, though they still need time to mature fully. Their pupils can now dilate and contract in response to light stimuli. After birth, your newborn will be extremely sensitive to bright light, but within a couple of weeks, their vision will stabilize.​

At 34 weeks, your baby’s lungs are nearly mature. Babies born at 34 weeks have very strong survival rates and generally do well with minimal medical support. The skull bones, however, remain soft and slightly unfused — this is completely intentional, as it allows the head to compress slightly to pass through the birth canal.

Weeks 35–36: Getting Ready for Birth

By week 35, your baby may weigh around 2.4 kg (5.3 lbs) and measure approximately 46 cm. The lanugo — the fine, downy hair that covered their body — is beginning to disappear as it is no longer needed for insulation now that fat stores are sufficient. Most of the major organ systems are fully operational, though the brain and lungs continue to mature right up until birth.

At 36 weeks, your doctor will likely perform an ultrasound to check the baby’s position. A routine 36-week scan has been shown to detect fetal abnormalities that may have been missed in earlier scans, helping medical teams prepare for delivery. Your baby should ideally be in a head-down (vertex) position by this point. If they are in a breech position (feet or bottom down), your healthcare provider will discuss your options, which may include an external cephalic version (ECV) or a planned cesarean section.​

What Symptoms Should You Expect?

Shortness of Breath

As your uterus expands upward, it presses against your diaphragm and lungs, reducing the space available for your lungs to fully expand. This causes shortness of breath, especially when walking up stairs or lying flat. Sleep propped up with pillows to give your lungs more room, and do not push yourself physically if you feel winded. If shortness of breath comes on suddenly or is accompanied by chest pain, contact your doctor immediately.​

Frequent Urination

Your growing baby is pressing directly on your bladder, which means you will be making many more trips to the bathroom. There is little you can do to stop this, but you can reduce nighttime trips by limiting fluids in the two hours before bed. Never reduce your overall daily water intake — staying well hydrated is essential for both you and your baby.​

Braxton Hicks Contractions

These practice contractions become stronger and more frequent in the eighth month. They feel like a tightening or hardening of the abdomen and typically last 30 to 60 seconds. Unlike true labor contractions, Braxton Hicks do not follow a regular pattern and do not increase in intensity. Drinking a glass of water, changing your position, or taking a short walk usually makes them subside. If contractions become regular, painful, and closer together, call your midwife or obstetrician.​

Leg Cramps and Swelling

Leg cramps, particularly at night, are a very common complaint in the third trimester. They are thought to be caused by changes in circulation, pressure from the growing uterus on blood vessels, and possible magnesium or calcium deficiency. Staying hydrated, doing gentle calf stretches before bed, and ensuring adequate calcium intake can help. Mild swelling (edema) in the feet and ankles is also normal, but sudden or severe swelling in the face or hands should be reported to your doctor, as it can be a sign of preeclampsia.

Pelvic Girdle Pain

Many women experience significant pelvic pain during the eighth month as the hormone relaxin causes the joints of the pelvis to loosen in preparation for birth. This can make walking, climbing stairs, or turning over in bed painful. A pregnancy support belt can help, as can sleeping with a pillow between your knees. A physiotherapist specialized in pelvic health can provide targeted exercises to manage this discomfort.​

Back Pain and Rib Pressure

As your baby grows, they press against your ribs and stretch your abdominal muscles, causing lower back pain and rib soreness. Maintaining good posture, wearing supportive flat shoes, and using a lumbar pillow when sitting are simple but effective strategies. Avoid standing for long periods, and when lifting anything — even light objects — always bend at the knees, not the waist.​

The Nesting Instinct

You may notice a sudden, overwhelming urge to organize, clean, and prepare your home for the baby’s arrival. This is called the nesting instinct, and it is driven by hormonal changes, including increases in oxytocin and adrenaline as your body begins preparing for labor. While nesting is a perfectly healthy and natural phenomenon, be mindful not to overexert yourself. Delegate the heavy tasks and focus on light, meaningful preparations like setting up the nursery or washing baby clothes.​

Important Medical Appointments This Month

The Group B Strep (GBS) Test

Between weeks 35 and 37, your doctor will swab your vagina and rectum to test for Group B Streptococcus, a bacteria that can be present in up to one-third of healthy pregnant women without causing any symptoms. While harmless to the mother, GBS can be passed to the baby during birth and cause serious infections, including sepsis and meningitis. If you test positive, you will be given intravenous antibiotics during labor, which is highly effective at protecting your baby.

The Tdap Vaccine

The CDC recommends that all pregnant women receive the Tdap vaccine between weeks 27 and 36 of each pregnancy, ideally as early in this window as possible. This vaccine protects your newborn against whooping cough (pertussis), a potentially life-threatening illness for babies too young to be vaccinated themselves. Studies have shown that Tdap vaccination during pregnancy prevents more than 3 in 4 cases of whooping cough in babies under 2 months old. Getting vaccinated in every pregnancy — even if pregnancies are close together — is recommended because antibody levels decline over time.

Your Prenatal Appointments

In the eighth month, you will likely begin seeing your doctor or midwife every two weeks. These visits include measuring your fundal height, checking the baby’s heartbeat, monitoring your blood pressure, and confirming the baby’s position. Do not skip these appointments — they are your best early warning system for detecting complications like preeclampsia, gestational diabetes management, or growth issues.​

Signs of Preterm Labor: When to Call Your Doctor

Knowing the warning signs of premature labor is critical at this stage. Call your healthcare provider immediately if you experience:

• Regular contractions that occur more than 4 times per hour before 37 weeks​

• A gush or steady trickle of fluid that may indicate your water has broken

• Persistent, dull lower back pain that does not ease with rest

• Pelvic pressure or a feeling that the baby is pushing down

• Any vaginal bleeding

Babies born between 34 and 36 weeks are considered late preterm and generally do very well, but earlier deliveries may require a stay in the neonatal intensive care unit. The sooner a potential preterm labor is caught, the more options your medical team has to help.​

Nutrition in Month 8

Your body needs high-quality fuel to support your baby’s final growth push and to build your own reserves for labor and breastfeeding. Focus on:​

• Iron-rich foods such as lentils, spinach, lean red meat, and fortified cereals to prevent anemia, which is common in the third trimester

• Calcium sources like dairy products, fortified plant milks, almonds, and broccoli to support your baby’s rapidly hardening bones

• Omega-3 fatty acids from sources like salmon, walnuts, and flaxseed, which support your baby’s brain development

• Fiber from fruits, vegetables, and whole grains to combat the constipation that affects many women in late pregnancy

• Small, frequent meals instead of large ones, since your stomach is compressed by the growing uterus — this also reduces heartburn and indigestion​

Avoid lying down immediately after eating, as this worsens acid reflux. Keep healthy snacks like nuts, yogurt, and fruit close at hand for when hunger strikes between meals.​

Safe Exercise in the 8th Month

Staying active in the eighth month benefits both you and your baby. Regular exercise improves circulation, reduces swelling, boosts your mood, and helps prepare your body for the physical demands of labor. The following activities are safe and beneficial:​

Walking is the simplest and most accessible exercise — even a 20-minute daily walk significantly improves cardiovascular health and reduces stress. Prenatal yoga builds flexibility, strengthens the pelvic floor, and teaches the breathing techniques that will be invaluable during labor. Swimming takes all the pressure off your joints and spine while providing excellent full-body conditioning. Pelvic floor exercises (Kegels) strengthen the muscles that support your uterus, bladder, and bowel, reducing incontinence during and after pregnancy.​

Avoid any high-impact activities, contact sports, exercises that involve lying flat on your back for extended periods, and anything that requires strong abdominal engagement. If you experience pain, dizziness, or shortness of breath during exercise, stop immediately.

Travel During Month 8

If travel is necessary, always consult your doctor first. For car journeys, take a break every 60–90 minutes to walk around and stimulate circulation and reduce the risk of blood clots. Keep your seatbelt positioned below your bump, not across it. Most airlines restrict travel after 36 weeks of pregnancy and may require a doctor’s letter after 28 weeks — check your airline’s policy before booking. Stay well hydrated throughout any journey, and have your prenatal records with you at all times.​

Preparing Your Hospital Bag

The eighth month is the right time to have your hospital bag ready. Pack the following:

• Your identity documents, insurance card, and prenatal health records

• A written birth plan outlining your preferences for pain management, labor positions, and any special requests

• Comfortable, loose-fitting clothes for labor and recovery

• Toiletries, lip balm (essential for breathing during labor), and hair ties

• Snacks for you and your birth partner during a potentially long labor

• A phone charger, headphones, and anything that will help you stay calm (music, a guided meditation app, an essential oil roller)

• Going-home outfits for you and the baby, including an appropriate car seat already installed

Rest, Sleep, and Mental Well-Being

Sleep becomes increasingly difficult in the eighth month due to your growing belly, frequent urination, and leg cramps. Sleeping on your left side is recommended by most healthcare providers as it optimizes blood flow to the placenta and reduces pressure on the major blood vessels. Use a pregnancy pillow to support your belly, lower back, and the space between your knees simultaneously.

Emotionally, it is completely normal to feel a mixture of excitement, anxiety, and fear as your due date approaches. Talk openly with your partner, family, or a trusted friend about how you are feeling. If anxiety feels overwhelming or you experience prolonged sadness, speak to your healthcare provider — prenatal mental health support is just as important as physical care.​

Frequently Asked Questions

Can I feel my baby moving less at 8 months?
It is normal for the nature of movements to change — you will feel fewer rolls and more pushes and stretches as space becomes tighter. However, you should still feel at least 10 movements within 2 hours when you sit quietly and pay attention. If you notice a significant reduction in movement, contact your doctor or midwife the same day.​

Is it normal to feel exhausted at 8 months pregnant?
Absolutely. Your body is working around the clock to support a growing baby, and the physical demands of carrying extra weight take a real toll. Honor your need for rest without guilt — napping when you can and delegating household tasks is not laziness, it is essential self-care.​

What does it mean if my baby is breech at 8 months?
A breech presentation at 8 months is not yet cause for alarm, as many babies turn on their own before 36 weeks. Your doctor will monitor the baby’s position and discuss options with you closer to your due date, including exercises, ECV, or planning a cesarean if necessary.​

Is it safe to have sex at 8 months pregnant?
In most normal, low-risk pregnancies, sex is safe throughout the third trimester. If you have placenta previa, unexplained bleeding, or have been told you are at risk of preterm labor, your doctor may advise against it. When in doubt, always ask your healthcare provider.

What are the first signs that labor is approaching?
In the final weeks, you may notice the baby « dropping » lower into the pelvis (called lightening), an increase in vaginal discharge, a loss of the mucus plug, or more frequent and intense Braxton Hicks contractions. However, true labor is confirmed by regular, intensifying contractions that do not stop with movement or hydration.​