At 30 weeks pregnant, you’re entering the home stretch of your third trimester with about 10 weeks to go. Your baby is roughly the size of a large cabbage, weighing close to 3 pounds and measuring around 16 inches long. This is a period of rapid growth for both of you, and the physical demands on your body are ramping up noticeably.
What Your Baby Is Doing Right Now
Your baby’s brain is developing at a furious pace during these final weeks. The brain’s surface is becoming increasingly wrinkled and folded, creating the grooves that allow for more brain cells and more complex function. Full brain and nervous system development wraps up around 33 weeks, so the groundwork being laid right now is critical.
The lungs are another major work in progress. At 30 weeks, your baby’s lungs are still maturing and won’t be fully formed until around 36 weeks. They’re gradually producing more surfactant, a substance that keeps the tiny air sacs in the lungs open so they can absorb oxygen after birth. This is one of the key reasons every additional week of pregnancy matters for babies who might arrive early.
Your baby is also building up fat stores, which will help with temperature regulation after birth. You may notice that movements feel different now. Instead of the fluttery kicks from earlier months, you’re more likely to feel rolls, stretches, and firm jabs as space in the uterus gets tighter.
Common Symptoms at 30 Weeks
The third trimester brings a distinct set of physical changes, and by 30 weeks most of them are in full swing.
Braxton Hicks contractions are mild tightening sensations across your belly. They come and go without a regular pattern, often showing up in the afternoon or evening, after physical activity, or after sex. They tend to get more frequent as your due date approaches. These are your uterus practicing for labor, not a sign that labor is starting.
Heartburn and acid reflux become more persistent as your growing uterus pushes your stomach upward. Eating smaller, more frequent meals helps. Avoid lying down right after eating, and steer clear of fried foods, citrus, chocolate, spicy dishes, and carbonated drinks. Drinking water between meals rather than during them can also reduce the burn.
Pelvic pressure and frequent urination increase as the baby settles deeper into your pelvis. You may find yourself getting up multiple times at night to use the bathroom, and leaking urine when you laugh, cough, sneeze, or bend is completely normal at this stage. Pelvic floor exercises can help manage this.
Other common complaints include lower back pain from your shifted center of gravity, swollen ankles and feet (especially by the end of the day), shortness of breath as your uterus crowds your diaphragm, and difficulty finding a comfortable sleeping position.
Tracking Your Baby’s Movements
Around 28 to 30 weeks, your provider will likely ask you to start doing daily kick counts. The goal is straightforward: feel 10 movements (kicks, rolls, flutters, or swishes) within a two-hour window. Pick a time of day when your baby is typically active, lie on your left side or sit with your feet up, place your hands on your belly, and count.
Most babies hit 10 movements well before two hours. Once you reach 10, you’re done for the day. If two hours pass without 10 movements, contact your provider. Also reach out if your baby’s movement pattern changes abruptly or slows down noticeably. You know your baby’s rhythms better than anyone by this point.
What Happens at Your Prenatal Visits
During the third trimester, prenatal appointments typically happen every two to four weeks, then increase to every one to two weeks starting at 36 weeks. At each visit, your care team will check your blood pressure, weight, the baby’s heartbeat, and ask about fetal movement, contractions, and any fluid leaks or bleeding.
If you haven’t already received the Tdap vaccine (which protects your newborn against whooping cough), the recommended window is between 27 and 36 weeks. Getting vaccinated during this period allows your body to pass protective antibodies to your baby before birth.
Weight Gain in the Third Trimester
Steady weight gain matters most during the second and third trimesters. If you started pregnancy at a healthy weight, the general target is about 1 pound per week through delivery. If you started at a higher weight, the recommendation drops to roughly half a pound per week. These are averages, though. Some weeks you’ll gain more, others less. The overall trend is what your provider watches.
Sleep and Comfort
Finding a comfortable sleeping position gets harder as your belly grows. An NIH-funded study found that sleeping on your back or either side through 30 weeks does not appear to increase the risk of stillbirth or other pregnancy complications. However, the study did not evaluate sleep positions beyond 30 weeks, so most providers recommend switching to side sleeping from this point forward as a precaution.
A pillow between your knees, behind your back, or a full-length pregnancy pillow can make side sleeping more comfortable. If you wake up on your back, don’t panic. Simply roll to your side and settle back in.
Signs of Preterm Labor
At 30 weeks, it’s important to know the difference between normal Braxton Hicks contractions and preterm labor. Contact your provider right away if you experience any of the following:
- Regular or frequent contractions (more than six per hour that are getting stronger)
- A constant, dull low backache that doesn’t go away with position changes
- Pelvic pressure or cramping that feels like menstrual pain
- Vaginal spotting or light bleeding
- A gush or steady trickle of fluid, which could mean your water has broken
- Vaginal discharge that is watery, bloody, or mucus-like
The reassuring news: 98% of babies born at 30 weeks survive. A baby born this early would need time in a neonatal intensive care unit for help with breathing, feeding, and temperature regulation, since sucking and swallowing reflexes aren’t fully developed yet and the lungs still need support. But outcomes at 30 weeks are very good, and every additional day in the womb improves them further.
Getting Ready: Practical Preparations
Thirty weeks is a great time to start packing your hospital bag. You don’t need to finish it today, but having the basics gathered means you won’t be scrambling if things happen ahead of schedule. For yourself, think comfortable: a robe or front-opening shirt for nursing, loose pajamas, slippers, a nursing bra, toiletries, and going-home clothes that fit your postpartum body (maternity clothes work well). For the baby, you’ll need a going-home outfit with layers, a blanket or two, socks, and a properly installed rear-facing car seat. Your partner should pack a phone charger, snacks, a change of clothes, and a camera.
This is also a good window to finalize your birth plan, tour the hospital or birth center if you haven’t already, and take care of any remaining nursery setup. With 10 weeks left, you have time, but the third trimester has a way of moving faster than you expect.