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Discover what happens during week 39 of third trimester. Baby development, body changes, symptoms, and a weekly checklist.
As you unlock another treasure chest of being full term, your biggest reward is now a blink away (or maybe just another very tiring thousands of blinks or so). Once the baby arrives, your life will not be the same, especially initially, so make sure to soak it all in every once in a while.
Third Trimester is a time of rapid change — for both you and your baby. Every pregnancy is unique, and the information below will help you understand what's happening and how to prepare for the weeks ahead.

Your uterus remains at or near its maximum size, placing intense pressure on the pelvis, bladder, hips, and lower back. Hormonal activity continues preparing the cervix and muscles involved in labor. Your body is now waiting for labor signals to fully begin.
You may feel increased contractions, stronger pelvic pressure, or sudden waves of fatigue and discomfort. Emotionally, this stage can feel exciting, restless, overwhelming, or deeply surreal all at once.
The lungs are fully mature, and body fat continues helping with temperature regulation and energy storage after birth. Most organs are fully developed and functioning, while the brain continues important growth right up until delivery. Movements remain important, even if they feel different now.

Each week brings new things to prepare for. Here's what expecting parents during week 39 typically track in the BabySteps Companion app. Items are sorted by priority so you can focus on what matters most.
Decide on a name! Before you leave the hospital, give your baby a name that'll be music to your ears.
You can expect to see your specialist every week until your little one is in your arms. At these visits, your doctor will check your weight, blood pressure, and urine. They will also listen to your baby's heartbeat and do ultrasounds to check the baby's development.
Get the inside scoop on what happens during delivery. Preparation is key, and knowledge is your guiding light.
Stock up on light entertainment to keep you company during the waiting game. The final countdown is on!
Get reminders, mark items as done, and never miss a step.
Get week-by-week guidance tailored to your role, health & history, symptoms, and stage of pregnancy.
Every pregnancy is different, but these are some of the most common sensations women report during week 39. Your experience is valid — whether you feel all of these or none at all.
During pregnancy, hormonal changes can increase blood flow to the gums, making them more susceptible to bleeding and inflammation, a condition known as pregnancy gingivitis. To maintain oral health, brush and floss regularly, and schedule regular dental check-ups. If you experience persistent or excessive bleeding gums, consult your dentist or healthcare provider for evaluation and advice.
Read moreBraxton Hicks contractions are intermittent, painless contractions of the uterus that occur throughout pregnancy. They are often described as a tightening or hardening of the abdomen and are considered a normal part of preparing the uterus for childbirth. However, if contractions become frequent, intense, or are accompanied by other symptoms like vaginal bleeding or pelvic pressure, consult your healthcare provider.
Read moreHormonal fluctuations during pregnancy can lead to mood swings, characterized by sudden changes in emotions, ranging from happiness to sadness or irritability. It's essential to communicate openly with your partner and healthcare provider about your feelings and concerns. Engaging in relaxation techniques, maintaining a healthy lifestyle, and seeking support from loved ones can help manage mood swings during pregnancy.
Read moreThe round ligaments are two bands of tissue that support the uterus. As your uterus grows, the round ligaments can stretch, which can cause pain in the lower abdomen or groin area. To relieve round ligament pain, try changing positions, practicing gentle stretches, and applying heat or cold packs. However, if pain is severe or persistent, consult your healthcare provider.
Read moreThe rupture of the amniotic sac, known as the water breaking, is a sign that labor may soon begin. This can happen as a gush of fluid or a trickle. If you suspect your water has broken, contact your healthcare provider or go to the hospital for evaluation, especially if you're near your due date or experiencing contractions.
Read moreAsk BabySteps AI and get guidance based on your pregnancy stage.
Learn more about what to expect with expert-guided videos and articles curated for this stage of your pregnancy.
Join thousands of parents using BabySteps to track symptoms, milestones, appointments, and baby development in one place.