29 Weeks Pregnant: Muscles and Lungs Continue Maturing

Week 29 continues the steady progress of the third trimester — your baby is growing stronger by the day, both literally and developmentally, while your body works harder to support this final and demanding stretch of pregnancy.

What's Happening With Your Baby This Week

About the size of a butternut squash, your baby continues important physical development:

• Muscles and lungs continue strengthening, preparing gradually for life outside the womb.
• Your baby's movements may feel stronger and more forceful as muscle strength increases.
• The head is growing to accommodate a rapidly developing brain, which continues forming new connections at an impressive rate.
• Bones are fully formed but still soft and flexible, an important feature that helps during the birthing process.
• Your baby's kidneys are fully functional, and digestive system practice continues.

What's Happening In Your Body

• Backaches and pelvic pressure often continue intensifying as your baby grows heavier.
• Frequent urination often returns or increases as the growing uterus presses more on the bladder.
• Shortness of breath can become more noticeable during activity as the uterus continues expanding.
• Varicose veins or swelling may increase, particularly by the end of the day.
• Braxton Hicks contractions often continue occurring periodically throughout the day.

Practical tip: If frequent urination is disrupting sleep, try reducing fluid intake in the hour or two before bed while still staying well hydrated earlier in the day.

What You Should Do This Week

• Continue your kick-count routine, noticing your baby's typical daily pattern of movement.
• Prioritize iron-rich foods, as anemia becomes more common in the third trimester due to increased blood volume demands.
• Practice gentle stretching or prenatal yoga to help manage backache and improve comfort.
• Continue prenatal vitamins and attend all scheduled appointments consistently.
• Rest with your feet elevated when possible to help manage swelling.

Frequently Asked Questions

Is it normal for movements to feel stronger now?
Yes, as your baby's muscles strengthen and space becomes more limited, movements often feel more forceful and distinct compared to earlier in pregnancy.

Why is anemia more common in the third trimester?
Blood volume increases substantially during pregnancy, and iron demands rise to support this — regular blood tests help your doctor monitor and address this if needed.

Is shortness of breath during activity something to worry about?
Mild breathlessness during activity is common as the uterus presses on the diaphragm. Sudden, severe breathlessness at rest should always be evaluated promptly.

How much weight gain is typical by 29 weeks?
This varies significantly by individual and pre-pregnancy weight — your doctor is the best source for guidance specific to your situation and overall health.

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Medical Disclaimer: This article is intended for general informational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified gynecologist or healthcare provider regarding your individual pregnancy, symptoms, or concerns.