What to Expect in the Third Trimester of Pregnancy

Baby’s Development in the Third Trimester

Your baby grows rapidly during these weeks and prepares for life outside the womb:

• Weeks 27-30: The baby’s brain grows significantly, and they start regulating their body temperature. They may also begin practicing breathing movements. By Week 30, your baby is about the size of a cabbage.

• Weeks 31-35: Fat continues to build under the skin, making the baby’s body less wrinkled. Their eyes can open and close, and they respond to light and sound. By Week 35, your baby is about the size of a pineapple.

• Weeks 36-40: The baby’s lungs and brain complete their development. They settle into the head-down position in preparation for birth. By Week 40, your baby is about the size of a watermelon.

Changes in Your Body

The third trimester brings many physical and emotional changes as your body prepares for delivery.

Physical Symptoms

• Braxton Hicks Contractions: You may experience irregular “practice” contractions that prepare your body for labor.

• Increased Fatigue: Carrying the extra weight and changes in your body can leave you feeling tired.

• Shortness of Breath: As your baby grows, they may press on your diaphragm, making it harder to breathe deeply.

• Back Pain: The added weight and shifted center of gravity can cause lower back discomfort.

• Swelling: Hormonal changes and fluid retention may lead to swelling in your feet, ankles, and hands.

• Heartburn: The growing uterus can push against your stomach, causing acid reflux.

• Frequent Urination: The baby’s position puts extra pressure on your bladder, leading to more bathroom trips.

• Leaking Colostrum: Your breasts may start producing colostrum, the first milk, in preparation for breastfeeding.

Emotional Changes

• Excitement and anticipation build as you prepare for the arrival of your baby.

• Anxiety about labor and delivery is common but manageable with education and preparation.

What You Can Do in the Third Trimester

Stay Healthy

• Maintain a Balanced Diet: Focus on iron-rich foods to prevent anemia and fiber to ease constipation.

• Hydrate: Drink plenty of water to reduce swelling and stay energized.

• Stay Active: Gentle exercises, like walking or prenatal yoga, can help with circulation and prepare your body for labor.

Prepare for Baby

• Pack Your Hospital Bag: Include essentials for yourself, your partner, and your baby, such as clothes, toiletries, and important documents.

• Install the Car Seat: Ensure the car seat is properly installed well before your due date.

• Finalize the Nursery: Set up your baby’s sleeping and changing areas to make things easier after birth.

Take Care of Yourself

• Practice Relaxation Techniques: Breathing exercises, meditation, or prenatal massage can reduce stress and ease discomfort.

• Sleep Smart: Use pillows to support your belly and back to improve sleep quality. Sleeping on your left side can help with circulation.

Prepare for Labor

• Take a Childbirth Class: Learn about labor stages, pain management options, and what to expect during delivery.

• Understand Labor Signs: Familiarize yourself with signs of labor, including regular contractions, water breaking, and lower back pain.

When to Call Your Doctor

Certain symptoms in the third trimester require immediate medical attention:

• Severe or persistent headaches

• Sudden swelling in your hands, feet, or face

• Vaginal bleeding or fluid leakage

• Decreased baby movements

• Signs of preterm labor, such as regular contractions before Week 37

Milestones to Look Forward To

• Baby Shower: Celebrate your upcoming arrival with family and friends.

• Feeling Baby Drop: Known as lightening, this occurs when the baby moves into the pelvis in preparation for birth.

• Meeting Your Baby: The most exciting milestone of all—your baby’s arrival!

Final Thoughts

The third trimester is a time of preparation and anticipation. While the physical demands can be challenging, it’s also a period filled with excitement as you approach the moment you’ll meet your baby. Stay focused on your health, lean on your support system, and trust in your body’s ability to bring new life into the world. You’re almost there!

References

https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/fetal-development/art-20045997?utm

https://www.hopkinsmedicine.org/health/wellness-and-prevention/the-third-trimester?utm

https://www.webmd.com/baby/third-trimester-of-pregnancy?utm

https://www.sutterhealth.org/health/pregnancy/third-trimester-fetal-development?utm

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